Perl Maven - Keywords

This is the list of keywords or topics you can find articles about. You can look up these keywords from anywhere on the site by typing the keyword in the box at the top of the page.

!
- Logical Operators in Perl - video
!=
- != Not equal. Comparing values as numbers.
- Comparing scalars in Perl
!~
- Introduction to Regexes in Perl 5
"
- Strings in Perl: quoted, interpolated and escaped
- strings in double quotes - video
#
- Comments - video
- Process the 6 headers of Markua
#!
- The Hash-bang line, or how to make a Perl scripts executable on Linux
##
- Process the 6 headers of Markua
###
- Process the 6 headers of Markua
####
- Process the 6 headers of Markua
#####
- Process the 6 headers of Markua
######
- Process the 6 headers of Markua
$
- $, the output field separator, and $" the list separator of Perl
- How to extract strings from a file
- Installing and getting started with Perl
- Scalar values and variables - video
- Scalar variables
$!
- $!
- No such file - video
- Variable "..." will not stay shared ...
- do
$"
- $" $LIST_SEPARATOR
- $, the output field separator, and $" the list separator of Perl
$#
- $#
- Array references in Perl
- Perl Arrays
$#$
- Array references in Perl
$#array
- Array indexes (screencast) - video
- Array indexes - video
$$
- $$
- $$, $PROCESS_ID, $PID- The process number of the current script / program / executable.
- Forking, Process ID, Parent Process ID, init
- How to dereference a reference to a hash or to an array in Perl
- Variable "..." will not stay shared ...
$%
- $%
- $% - $FORMAT_PAGE_NUMBER - The current page number of the currently selected output channel.
$&
- $&
$'
- $'
$(
- $(
$)
- $)
$*
- $*
$+
- $+
$,
- $,
$-
- $-
$.
- $.
$/
- $/
- Chomp and $/, the Input Record Separator
- How to replace a string in a file with Perl
- slurp mode - reading a file in one step
$0
- $0
- $0 - $PROGRAM_NAME - The name of the program (script) being executed.
- Command line parameters (screencast) - video
- Command line parameters - video
- How to create a Perl Module for code reuse?
- Processing command line arguments - @ARGV in Perl
$1
- $1
- Always check if the regex was successful
- Perl 5 Regex Cheat sheet
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$2
- $2
- Perl 5 Regex Cheat sheet
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$3
- $3
- Perl 5 Regex Cheat sheet
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$4
- $4
- Perl 5 Regex Cheat sheet
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$5
- $5
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$6
- $6
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$7
- $7
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$8
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$9
- Regex capturing variables $1, $2, $3, $4, $5, $6, ...
$:
- $:
$;
- $;
$<
- $<
$=
- $=
$>
- $>
$?
- $?
- How to exit from a Perl script?
$@
- $@
- Echo server with logging and timeout
- Exception handling in Perl: How to deal with fatal errors in external modules
- do
$[
- $[
- $[ - This variable stores the index of the first element in an array, and of the first character in a substring. This was a bad idea to expose. You should not change it!
$\
- $\
$]
- $]
$^
- $^
$^A
- $^A
$^C
- $^C
$^D
- $^D
$^E
- $^E
$^F
- $^F
$^H
- $^H
$^I
- $^I
$^L
- $^L
$^M
- $^M
$^N
- $^N
$^O
- $^O $OSNAME
$^P
- $^P
$^R
- $^R
$^S
- $^S
$^T
- $^T
- File modify date - When was a file last changed?
$^V
- $^V
$^W
- $^W
$^X
- $^X
$_
- $_
- $_ the default variable of Perl
- Perl split - to cut up a string into pieces
- The diamond operator <> of Perl
$_[0]
- Constructor and accessors in classic Perl OOP
- Subroutines and functions in Perl
$`
- $`
$a
- $a
- $a - $b - Special variables when using sort(). Don't use them for anything else besides your sort function!
- Don't use $a and $b outside of sort, not even for examples
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- Sorting arrays in Perl
- Sorting mixed strings
$ACCUMULATOR
- $ACCUMULATOR
$ARG
- $ARG
$ARGV
- $ARGV
$ARGV[0]
- Command line parameters (screencast) - video
- Command line parameters - video
$ARGV[]
- Processing command line arguments - @ARGV in Perl
$array[$i]
- How to change an element of an array in Perl
$array[1]
- Array indexes (screencast) - video
- Array indexes - video
$b
- $a - $b - Special variables when using sort(). Don't use them for anything else besides your sort function!
- $b
- Don't use $a and $b outside of sort, not even for examples
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- Sorting arrays in Perl
- Sorting mixed strings
$BASETIME
- $BASETIME
$Bin
- How to add a relative directory to @INC
- The 19 most important file-system tools in Perl 5
$CHILD_ERROR
- $CHILD_ERROR
$COMPILING
- $COMPILING
$count[$c]++
- Count digits - video
$count{$word}++
- Counting words in a file - video
$DB::single
- Add (conditional) debugger breakpoints to your code
- Debugging compile time code (debugging BEGIN block, debugging module body)
$DEBUGGING
- $DEBUGGING
$EFFECTIVE_GROUP_ID
- $EFFECTIVE_GROUP_ID
$EFFECTIVE_USER_ID
- $EFFECTIVE_USER_ID
$EGID
- $EGID
$ENV
- .env - the dot env application configuration file
$ERRNO
- $ERRNO
$EUID
- $EUID
- $EUID - $> - The effective uid of this process.
$EVAL_ERROR
- $EVAL_ERROR
$EXCEPTIONS_BEING_CAUGHT
- $EXCEPTIONS_BEING_CAUGHT
$EXECUTABLE_NAME
- $EXECUTABLE_NAME
$EXTENDED_OS_ERROR
- $EXTENDED_OS_ERROR
$FORMAT_FORMFEED
- $FORMAT_FORMFEED
$FORMAT_LINE_BREAK_CHARACTERS
- $FORMAT_LINE_BREAK_CHARACTERS
$FORMAT_LINES_LEFT
- $FORMAT_LINES_LEFT
$FORMAT_LINES_PER_PAGE
- $FORMAT_LINES_PER_PAGE
$FORMAT_NAME
- $FORMAT_NAME
$FORMAT_PAGE_NUMBER
- $FORMAT_PAGE_NUMBER
$FORMAT_TOP_NAME
- $FORMAT_TOP_NAME
$GID
- $GID
$INPLACE_EDIT
- $INPLACE_EDIT
$INPUT_LINE_NUMBER
- $INPUT_LINE_NUMBER
$INPUT_RECORD_SEPARATOR
- $INPUT_RECORD_SEPARATOR
- Chomp and $/, the Input Record Separator
- How to replace a string in a file with Perl
- slurp mode - reading a file in one step
$LAST_PAREN_MATCH
- $LAST_PAREN_MATCH
$LAST_REGEXP_CODE_RESULT
- $LAST_REGEXP_CODE_RESULT
$LAST_SUBMATCH_RESULT
- $LAST_SUBMATCH_RESULT
$LIST_SEPARATOR
- $" $LIST_SEPARATOR
- $, the output field separator, and $" the list separator of Perl
$MATCH
- $MATCH
$NR
- $NR
$OFS
- $, the output field separator, and $" the list separator of Perl
$ORS
- $ORS
$OS_ERROR
- $OS_ERROR
$OSNAME
- $^O $OSNAME
$OUTPUT_AUTOFLUSH
- $OUTPUT_AUTOFLUSH
- $| or $OUTPUT_AUTOFLUSH - Buffering or autoflush?
$OUTPUT_FIELD_SEPARATOR
- $, the output field separator, and $" the list separator of Perl
- $OUTPUT_FIELD_SEPARATOR
$OUTPUT_RECORD_SEPARATOR
- $OUTPUT_RECORD_SEPARATOR
$PERL_VERSION
- $PERL_VERSION
$PERLDB
- $PERLDB
$PID
- $$, $PROCESS_ID, $PID- The process number of the current script / program / executable.
- $PID
$POSTMATCH
- $POSTMATCH
$PREMATCH
- $PREMATCH
$PROCESS_ID
- $$, $PROCESS_ID, $PID- The process number of the current script / program / executable.
- $PROCESS_ID
$PROGRAM_NAME
- $PROGRAM_NAME
$REAL_GROUP_ID
- $REAL_GROUP_ID
$REAL_USER_ID
- $REAL_USER_ID
$RS
- $RS
- Chomp and $/, the Input Record Separator
- slurp mode - reading a file in one step
$self
- Inheritance and Method Modifiers in Moo
- Methods, Functions and Subroutines in Perl and what is $self ?
- Public and Private Methods in Moo-based Object Oriented Perl
$SIG{}
- How to capture and save warnings in Perl
$SUBSCRIPT_SEPARATOR
- $SUBSCRIPT_SEPARATOR
$SUBSEP
- $SUBSEP
$SYSTEM_FD_MAX
- $SYSTEM_FD_MAX
$UID
- $UID
$VAR1
- Debugging Perl scripts
$VAR2
- Debugging Perl scripts
$VERSION
- Enforce the same version numbers in all the Perl modules in a distribution
- How to compare version numbers in Perl and for CPAN modules
- Perl::Version vs version confusion
$WARNING
- $WARNING
${^CHILD_ERROR_NATIVE}
- ${^CHILD_ERROR_NATIVE}
${^ENCODING}
- ${^ENCODING}
${^GLOBAL_PHASE}
- ${^GLOBAL_PHASE}
${^LAST_FH}
- ${^LAST_FH}
${^MATCH}
- ${^MATCH}
${^OPEN}
- ${^OPEN}
${^POSTMATCH}
- ${^POSTMATCH}
${^PREMATCH}
- ${^PREMATCH}
${^RE_DEBUG_FLAGS}
- ${^RE_DEBUG_FLAGS}
${^RE_TRIE_MAXBUF}
- ${^RE_TRIE_MAXBUF}
${^TAINT}
- ${^TAINT}
${^UNICODE}
- ${^UNICODE}
${^UTF8CACHE}
- ${^UTF8CACHE}
${^UTF8LOCALE}
- ${^UTF8LOCALE}
${^WARNING_BITS}
- ${^WARNING_BITS}
${^WIN32_SLOPPY_STAT}
- ${^WIN32_SLOPPY_STAT}
$|
- $|
- $| or $OUTPUT_AUTOFLUSH - Buffering or autoflush?
- Perl One-liner: countdown on the command line:
- Standard output, standard error and command line redirection
- Use of uninitialized value
$~
- $~
%
- A hash and its uses - video
- Creating a hash - video
- Creating a hash from an array - video
- Exercise: improve Apache log analyzer - video
- Exercise: improve color selector - video
- Exercise: parse HTTP values - video
- Exercise: parse variable width fields - video
- Exercise: sort scores - video
- Fetching data from a hash - video
- Hashes in Perl
- Numerical Operators - video
- Numerical operators
- Scalar variables
- Solution: improve Apache log-analyzer - video
- Solution: improve color selector - video
- Solution: parse HTTP values - video
- Solution: parse variable width fields - video
- Solution: sort scores - video
- hash in SCALAR context - video
%!
- %!
%$
- How to dereference a reference to a hash or to an array in Perl
%+
- %+
%-
- %-
%=
- Numerical operators
%ENV
- %ENV
- .env - the dot env application configuration file
- Echo with plain CGI
%ERRNO
- %ERRNO
%INC
- %INC
- Which Perl modules are loaded in memory?
%LAST_MATCH_START
- %LAST_MATCH_START
%LAST_PAREN_MATCH
- %LAST_PAREN_MATCH
%OS_ERROR
- %OS_ERROR
%SIG
- %SIG
- Echo server with logging and timeout
- How to capture and save warnings in Perl
&
- Don't put & in-front of subroutines in Perl
- Memoization - speeding up function calls by caching of return values
&&
- Logical Operators in Perl - video
'
- Strings in Perl: quoted, interpolated and escaped
- strings in single quotes - video
(
- How to extract strings from a file
()
- List assignment - video
- Lists in Perl - video
- Regex Capturing - video
*
- Matching numbers using Perl regex
- Numerical Operators - video
- Numerical operators
- Parse bulleted list in Markua
- Perl 5 Regex Cheat sheet
- Perl 5 Regex Quantifiers
**
- **
*=
- Numerical operators
*?
- Minimal Regex Matching - video
*{}
- Memoization - speeding up function calls by caching of return values
+
- Matching numbers using Perl regex
- Numerical Operators - video
- Numerical operators
- Perl 5 Regex Cheat sheet
- Perl 5 Regex Quantifiers
- Scalar variables
- The magic unary plus (+)
++
- ++
- Command line counter with plain text file back-end
- Numerical operators
- String operators: concatenation (.), repetition (x)
+<
- Open file all - video
+=
- Numerical operators
+?
- Minimal Regex Matching - video
-
- Numerical Operators - video
- Numerical operators
- Parse bulleted list in Markua
- Regex character classes
--
- --
- Numerical operators
-=
- Numerical operators
->
- ->
- Getting started with Classic Perl OOP
-a
- Dancer2: Skeleton
- One-liner sum of column in CSV - video
-A
- -A
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-B
- -B
-b
- -b
-c
- -c
-C
- -C
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-d
- -d
- Add (conditional) debugger breakpoints to your code
- Debug sum numbers - video
- Debugging Perl scripts
- Debugging Perl scripts - video
- Debugging Perl with hdb
- Debugging compile time code (debugging BEGIN block, debugging module body)
- History in the Perl debugger, make the up arrow work
- Using the built-in debugger of Perl
- Using the built-in debugger of Perl as REPL
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-E
- 7 of the most useful Perl command line options
- Perl on the command line (screencast) - video
-e
- -e
- 7 of the most useful Perl command line options
- A bunch of Perl one-liners to edit HTML files
- One-liner sum of column in CSV - video
- Perl on the command line
- Perl on the command line (screencast) - video
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-F
- One-liner sum of column in CSV - video
-f
- -f
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-g
- -g
-i
- 7 of the most useful Perl command line options
- A bunch of Perl one-liners to edit HTML files
- Perl on the command line
-I
- Changing @INC - video
- How to change @INC to find Perl modules in non-standard locations
-k
- -k
-l
- -l
- Modules - Behind the scenes
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-m
- Modules - Behind the scenes
-M
- -M
- File modify date - When was a file last changed?
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-n
- A bunch of Perl one-liners to edit HTML files
- One-liner sum of column in CSV - video
-O
- -O
-o
- -o
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-p
- -p
- 7 of the most useful Perl command line options
- A bunch of Perl one-liners to edit HTML files
- Perl on the command line
-r
- -r
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-R
- -R
-S
- -S
-s
- -s
- How to get the size of a file in Perl
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-t
- -t
- The Hash-bang line, or how to make a Perl scripts executable on Linux
-T
- -T
- The Hash-bang line, or how to make a Perl scripts executable on Linux
-u
- -u
-V
- How does require find the module to be loaded?
- Perl on the command line (screencast) - video
-v
- 7 of the most useful Perl command line options
- Perl on the command line
- Perl on the command line (screencast) - video
-W
- -W
-w
- -w
- The Hash-bang line, or how to make a Perl scripts executable on Linux
- The problem with Perl 4 style libraries
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-x
- -x
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
-X
- -X
-z
- -z
- What are -e, -z, -s, -M, -A, -C, -r, -w, -x, -o, -f, -d , -l in Perl?
.
..
...
.env
.gitignore
.hgignore
/
- Numerical Operators - video
- Numerical operators
- Understanding dates using regular expressions
//
- How to set default values in Perl
- Introduction to Regexes in Perl 5
- Logical Operators in Perl - video
- What's new in Perl 5.10? say, //, state
//=
- How to set default values in Perl
- What's new in Perl 5.10? say, //, state
/=
- Numerical operators
/dev/null
- Standard output, standard error and command line redirection
/g
- Checking the whois record of many domains
- Count the frequency of words in text using Perl
- Here documents, or how to create multi-line strings in Perl
- How to extract strings from a file
/m
- Checking the whois record of many domains
- Here documents, or how to create multi-line strings in Perl
/usr/bin/perl
- The Hash-bang line, or how to make a Perl scripts executable on Linux
1)
- Parse numbered list in Markua
1.
- Parse numbered list in Markua
1;
- How to create a Perl Module for code reuse?
404
- Add "404 Not Found" page
5.010
- Smart Matching in Perl 5.10
- What's new in Perl 5.10? say, //, state
::
- Namespaces and packages in Perl
:memory:
- SQLite in Memory
;
- Unknown warnings category
- Your first script: Hello world - video
<
- < Less than. Comparing values as numbers.
- Compare Values - video
- Comparing scalars in Perl
- Comparison Operators - video
- Open and read from text files
- Open file all - video
<$fh>
- Filehandle in SCALAR and LIST context - video
- Open and read from text files
- Read file line by line - video
- read one line - video
<<
- Bare Here documents are deprecated - How to find offending code?
- Here documents - video
- Here documents, or how to create multi-line strings in Perl
<=
- <= Less than or equal. Comparing values as numbers.
- Comparing scalars in Perl
- Comparison Operators - video
<=>
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- Sorting arrays in Perl
- Sorting mixed strings
<>
- File globbing - video
- Filtering values using Perl grep
- The diamond operator <> of Perl
=!
- An extra space can ruin your day
==
- == Compare if two numbers are equal
- Compare Values - video
- Comparing scalars in Perl
=>
- => Fat arrow (or fat comma), a fancy way to write a comma ','. Especially used in key-value pairs.
- Hashes in Perl
=cut
- POD - Plain Old Documentation
=head1
- POD - Plain Old Documentation
=head2
- POD - Plain Old Documentation
=pod
- POD - Plain Old Documentation
=~
- Always check if the regex was successful
- Introduction to Regexes in Perl 5
>
- > Greater than. Comparing values as numbers.
- Compare Values - video
- Comparing scalars in Perl
- Comparison Operators - video
- Open file all - video
- Write to file - video
- Writing to files with Perl
>=
- >= Greater than or equal. Comparing values as numbers.
- Comparing scalars in Perl
- Comparison Operators - video
>>
- Appending to files
- How to exit from a Perl script?
- How to merge one text file to the end of another text file?
- Open file all - video
?
- Minimal Regex Matching - video
- Perl 5 Regex Cheat sheet
- Perl 5 Regex Quantifiers
- Understanding dates using regular expressions
?:
- How to extract strings from a file
- The Ternary operator - video
- The ternary operator in Perl
??
- Minimal Regex Matching - video
@
- Array references in Perl
- Perl Arrays
- Scalar variables
@$
- How to dereference a reference to a hash or to an array in Perl
@+
- @+
@-
- @-
@_
- @_
- Constructor and accessors in classic Perl OOP
- Passing multiple parameters to a function in Perl
- Passing two arrays to a function
- Scalar value ... better written as ...
- Subroutines and functions in Perl
- Variable number of parameters in Perl subroutines
- shift in Perl
@ARG
- @ARG
@ARGV
- @ARGV
- CLI - Command Line Interface in Perl
- Command line parameters (screencast) - video
- Command line parameters - video
- How to process command line arguments in Perl using Getopt::Long
- Processing command line arguments - @ARGV in Perl
- shift in Perl
@array
- Array assignment - video
- Creating an array - video
- How to change an element of an array in Perl
@array[]
- How to get a slice of an array or an array reference?
@EXPORT
- Exporting and importing functions easily
- Import on demand
@EXPORT_OK
- How to create a Perl Module for code reuse?
- Import on demand
@F
- @F
@hash{...}
- How to get a slice of a hash?
@INC
- Can't locate ... in @INC
- Changing @INC - video
- Changing @INC relative path - video
- How does require find the module to be loaded?
- How to add a relative directory to @INC
- How to change @INC to find Perl modules in non-standard locations
- How to create a Perl Module for code reuse?
- Removal of the current directory (".") from @INC in Perl 5.26 and Travis-CI
- What is @INC in Perl?
- Which Perl modules are loaded in memory?
@ISA
- OOP - Object Oriented Perl
@LAST_MATCH_END
- @LAST_MATCH_END
@LAST_MATCH_START
- @LAST_MATCH_START
@{ }
- Array references in Perl
[[:digit:]]
- Regex matching digits
[[:xdigit:]]
- Regex matching digits
[]
- Matching numbers using Perl regex
- Perl 5 Regex Cheat sheet
- Regex character classes
- Regex: special character classes
\
- Passing two arrays to a function
- Strings in Perl: quoted, interpolated and escaped
- Understanding dates using regular expressions
\&
- Memoization - speeding up function calls by caching of return values
\@
- Array references in Perl
\d
- Regex: special character classes
\D
- Regex: special character classes
\n
- Your first script: Hello world - video
\P
- Regex: special character classes
\p
- Regex: special character classes
\p{Uppercase}
- How to check if a string is all upper case (lower case) characters?
\s
- How to check if string is empty or has only spaces in it using Perl?
- How to extract strings from a file
- Regex: special character classes
\S
- Regex: special character classes
\t
- Multiple command line counters with plain TSV text file back-end
\W
- Regex: special character classes
\w
- Regex: special character classes
^
- How to extract strings from a file
- Matching numbers using Perl regex
__DATA__
__DIR__
__END__
__FILE__
__LINE__
__PACKAGE__
__SUB__
__WARN__
_Sep
abs
- abs
abs_path
- Get absolute path (aka. canonical path) using abs_path or canonpath
- Get real path (absolute path) from symbolic link (aka. softlink)
- How to create a Perl Module for code reuse?
accept
- accept
Access-Control-Allow-Methods
- Deleting item using Ajax request with DELETE and OPTIONS
Access-Control-Allow-Origin
- Stand-alone Ajax client and the Access-Control-Allow-Origin issue
accessor
- Attribute types in Perl classes when using Moose
- Core Perl OOP: attributes, getter - setter
- Object Oriented Perl using Moose
Actions
- Setup GitHub Actions for CPAN modules
ActivePerl
- Download and install Perl
- Installing a Perl Module from CPAN on Windows, Linux and Mac OSX
ActiveState
- Welcome and Installation - video
Additive Operators
- Additive Operators
adduser
- Create Linux user account - video
advanced
- Introduction to the Advanced Perl course
after
- Inheritance and Method Modifiers in Moo
Ajax
- Add and retrieve elements - jQuery + Ajax
- Ajax and Dancer 2
- How does the world wide web work?
- PSGI and AJAX for single-page applications
alarm
- Echo server with logging and timeout
- alarm
all
- Check several regexes on many strings
- Does the 'all' function of List::MoreUtils really short-circuit?
ALRM
- Echo server with logging and timeout
and
- Logical Operators in Perl - video
AngularJS
- Single Page Application with Perl Dancer and AngularJS
ANSI
- ANSI command line colors with Perl
any
- Creating a testing module
- Filtering values using Perl grep
- Testing a tree data structure in Perl
AnyEvent
- Anyevent, asynchronous programming in Perl
- Asynchronous web application with PSGI and Twiggy
- Fetching several web pages in parallel using AnyEvent
Apache
- Analyze Apache log file - video
- Deploying a Mojolicious Application using Hypnotoad and Apache
- Moving from CGI to PSGI and Starman
Apache2
- Perl/CGI script with Apache2
ApacheBench
- Concurrent Requests and measuring performance with ApacheBench
API::Drip::Request
- New on CPAN - week ending on 2017-08-27
App::BitBucketCli
- New on CPAN - week ending on 2017-08-27
App::cpanminus
- Install Perl modules without root rights on Linux Ubuntu 13.10 x64
- cpanm
append
- Appending to files
- How to merge one text file to the end of another text file?
append_utf8
- use Path::Tiny to read and write file
application
- Processing config file - video
aptitude
- Installing Perl modules from the OS vendor - video
Archive
- unzip using Archive::Any of Perl
Archive::Any
- unzip using Archive::Any of Perl
argc
- Processing command line arguments - @ARGV in Perl
ARGV
- ARGV
ARGVOUT
- ARGVOUT
around
- Inheritance and Method Modifiers in Moo
array
- How to eliminate a value in the middle of an array in Perl?
- Manipulating Perl arrays: shift, unshift, push, pop
- Perl Arrays
- Printing hash of hashes of arrays by the array
- Scalar and List context in Perl, the size of an array
- Splice to slice and dice arrays in Perl
- Transforming a Perl array using map
- Transpose a Matrix (Arrays or Arrays)
- Unique values in an array in Perl
- Unique values in an array reference in Perl
- Using a queue in Perl
ARRAY
- How to dereference a reference to a hash or to an array in Perl
- Moo with array reference as attributes - with or without default values
- Multi dimensional arrays in Perl
- Passing two arrays to a function
- ref - What kind of reference is this variable?
Array Interpolation
- Array Interpolation
ARRAY(0x703dcf2)
- Array references in Perl
array_each
- Testing a tree data structure in Perl
- Use of uninitialized value $got in pattern match (m//) at Test/Deep/Regexp.pm line 57.
arrays
- Perl Arrays
ASCII
- What is a text file and what is a binary file?
Assignment Operators
- Assignment Operators
associative
- Hashes in Perl
atan2
- atan2
attribute
- Attribute types in Perl classes when using Moose
- Core Perl OOP: attributes, getter - setter
Attribute::Handlers
- Attribute::Handlers to wrap a function
- Invalid CODE attribute
attributes
- Add attributes to Markua - round 1
Auto-increment and Auto-decrement
- Auto-increment and Auto-decrement
autoflush
- Buffering or autoflush?
- Immediate writing to file - flushing in Perl without buffering
AUTOLOAD
- AUTOLOAD - handling Undefined subroutines
autovivification
- What is autovivification?
B::Deparse
- An extra space can ruin your day
- Bug in the for-loop of Perl? - B::Deparse to the rescue
- Can't call method ... on unblessed reference
- Possible precedence issue with control flow operator
- The magic unary plus (+)
- Useless use of hash element in void context
- Useless use of private variable in void context
bar
- Acme::MetaSyntactic or how to get rid of foo and bar?
bareword
- Barewords in Perl
Barewords
- Barewords
base
- OOP - Object Oriented Perl
basename
- More UNIX commands - video
Bash
- Bash - shell scripting examples
BDD
- Exploring BDD in Perl - using Test::BDD::Cucumber
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 1
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 2
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 3
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 4
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 5 - with Erik Hülsmann
before
- Inheritance and Method Modifiers in Moo
- Refactoring Dancer 2 app, using before hook
BEGIN
- BEGIN
- BEGIN block - running code during compilation
- Changing @INC - video
- Test without a Plan
- What is the difference between require and use in Perl? What does import do?
Benchmark
- Benchmark: Refactoring MD5 calculation in Rex
- Comparing the speed of JSON decoders
Bigger Numbers
- Bigger Numbers
bind
- bind
Binding Operators
- Binding Operators
binmode
- How to create an Indian Rupee symbol with Perl code
- Reading and writing binary files in Perl
- binmode
- chr
BioSAILs
- New on CPAN - week ending on 2017-08-27
Bitbucket
- Bitbucket Pipelines (the CI system) for Perl projects
- Bitbucket Pipelines testing Perl projects
bitwise
- Avoid (unwanted) bitwise operators
Bitwise And
- Bitwise And
Bitwise Or and Exclusive Or
- Bitwise Or and Exclusive Or
Bitwise String Operators
- Bitwise String Operators
bless
- Constructor and accessors in classic Perl OOP
- Core Perl OOP: Constructor
- Getting started with Classic Perl OOP
- OOP - Object Oriented Perl
- Use the same sub as function or as method in Perl
- bless
- bless
blessed
- Class as type constraint
- Class method and alternative constructor in classic Perl OOP
- Stringification in classic Perl OOP
Blio
- Building a static blog using Blio and Github
blog
- Blogging with Riji
- Building a static blog using Blio and Github
- Minimal requirements for a blog
boolean
- Boolean values in Perl
break
- Loop controls: next, last, continue, break
- break
buffering
- Standard output, standard error and command line redirection
- Use of uninitialized value
Bugzilla
- 10: Dave Miller, the leader of the Bugzilla project
Build
- Packaging with Build.PL
Build.PL
- Build.PL of Module::Build
- Distribution directory layout
- How to run the tests of a typical Perl module
- Packaging with Build.PL
BUILDARGS
- Replacing an accessor by a method (using BUILDARGS)
builder
- Serving static files such as favicon.ico and robots.txt using Plack
C Operators Missing From Perl
- C Operators Missing From Perl
C-style Logical And
- C-style Logical And
C-style Logical Or
- C-style Logical Or
Cache
- Caching data using the Cache module
Cache::File
- Caching data using the Cache module
calendar
- Generate Calendar in ICal format
caller
- How deep is a recursion in Perl?
- Modulino: both script and module in Perl
- caller
CAM::PDF
- Parsing tables in PDF files
canonpath
- Get absolute path (aka. canonical path) using abs_path or canonpath
capital
- uc
capture
- Capture STDOUT and STDERR of external program using Capture::Tiny
Capture::Tiny
- Capture STDOUT and STDERR of external program using Capture::Tiny
- Testing Perl CGI application
Carp
- Detect recursion using state variables
Carp::Always
- Carp::Always to find the source of the problem
case
- Switch-Case statement in Perl 5
- Switching in Perl 5.10
casting
- Automatic string to number conversion or casting in Perl
cat
- ANSI command line colors with Perl
- How to merge one text file to the end of another text file?
- The diamond operator <> of Perl
Catalyst
- Catalyst, the MVC Perl web framework
- Modern Web with Perl
Catalyst::Plugin
- Finding all Plack Middleware or Perl::Critic Policies
catdir
- How to add a relative directory to @INC
- The 19 most important file-system tools in Perl 5
catfile
- Changing @INC relative path - video
- The 19 most important file-system tools in Perl 5
cd
- How to change directory (chdir, cd) in Perl?
CGI
- CGI - Common Gateway Interface
- Common causes and fixes for HTTP 500 Error in Perl CGI scripts
- Echo with plain CGI
- Hello World with plain CGI
- Modern Web with Perl
- Moving from CGI to PSGI and Starman
- Perl/CGI script with Apache2
- Running CGI script as a Plack application with Plack::App::CGIBin
- Simple CGI Perl script to send form by e-mail
- Testing Perl CGI application
- Which is better perl-CGI, mod_perl or PSGI?
cgi-bin
- CGI - Common Gateway Interface
CGI::Simple
- Echo with plain CGI
- Hello World with plain CGI
Chad Granum
- 8: Chad (Exodist) Granum, author of the Fennec testing tool
Changes
- Changes and README files in a Perl distribution
chat server
- Chat server using Net::Server
chdir
- How to change directory (chdir, cd) in Perl?
- Unix and DOS commands - video
- chdir
CHECK
- CHECK
- CHECK
chmod
- Unix and DOS commands - video
- chmod
chomp
- Chomp and $/, the Input Record Separator
- Installing and getting started with Perl
- Prompt, read from STDIN, read from the keyboard in Perl
- Variable interpolation - User Input and Output - chomp - video
- chomp
chop
- How to get the last character of a string in Perl?
- chop
chown
- Unix and DOS commands - video
- chown
chr
- chr
- chr
chroot
- chroot
CI
- Add GitHub Actions (CI) to Graphics-Toolkit-Color Perl module
- Adding GitHub Actions to Test2::Harness::UI
- CI - Continuous Integration
- CPAN Dashboard
- CPAN Digger explained
- CPAN Testers or CI system?
- Enable GitHub Actions for CI on Math::Polynomial::Chebyshev
- GitHub Actions CI job for Perl Test::Class - checking downstream dependencies as well
- GitHub Actions for CPAN modules
- GitLab CI for Perl projects
- Perl modules on CPAN having links to VCS and having CI configured
- Setup GitHub Actions for CPAN modules
- What is CI and why is it good for you?
CIDR
- Is this IP in the given subnet?
Citrus Perl
- Download and install Perl
class
- Attribute types in Perl classes when using Moose
- Object Oriented Perl using Moose
Class::Accessor
- Memory usage and load time of Moose, Moo, and Class::Accessor
clearer
- Moo attribute predicate and clearer
CLI
- GitLab CI Pipeline for Perl DBD::Mock using Module::Build
close
- How to replace a string in a file with Perl
- Writing to files with Perl
- close
closedir
- Reading the content of a directory
- closedir
cmp
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- Sorting arrays in Perl
- Sorting mixed strings
cmp_deeply
- Keep data in client and fetch only changes
cmp_ok
- Multiple expected values - testing dice
- Testing timeout with cmp_ok
CODE
- ref - What kind of reference is this variable?
Code::TidyAll
- Run Perl::Tidy to beautify the code
coerce
- Moose: coerce value to a subtype
color
- ANSI command line colors with Perl
column_names
- Reading CSV file as many hash-es
Comma Operator
- Comma Operator
Compatibility::PerlMinimumVersionAndWhy
- Set minimum version number in every Perl file
- Three-argument form of open used and it is not available until perl 5.6.
Compatibility::ProhibitThreeArgumentOpen
- Three-argument form of open used and it is not available until perl 5.6.
Conditional Operator
- Conditional Operator
confess
- Detect recursion using state variables
config
- Add and retrieve items - MongoDB, Dancer and Testing!
Config::Tiny
- Cloud automation at Digital Ocean using Perl
- Reading configuration INI files in Perl
- Using Twitter, sending Tweets from a Perl script
- Using the Open Weather Map API with Perl
connect
- connect
constant
- Constants and read-only variables in Perl
Constant Folding
- Constant Folding
CONSTRUCT
- CONSTRUCT
constructor
- Attribute types in Perl classes when using Moose
- Moose constructor
- Moose testing type constraint
- Object Oriented Perl using Moose
- bless
Content-type
- Hello World with plain CGI
context
- Can't locate object method "..." via package "1" (perhaps you forgot to load "1"?)
- Scalar and List context in Perl, the size of an array
- What are string and numeric contexts?
Context
- Context
continue
- Loop controls: next, last, continue, break
- The diamond operator <> of Perl
- continue
contributors
- Adding list of contributors to the CPAN META files
copy
- How to remove, copy or rename a file with Perl
- More UNIX commands - video
cos
- cos
counter
- Counter Examples
Coveralls
- Add test coverage reporting with Coveralls to Markua Parser in Perl
- Get Coveralls to notify when test-coverage shrinks
cp
- How to remove, copy or rename a file with Perl
CPAN
- 20 most popular Perl modules
- 2015 CPAN Pull Request Challenge
- CPAN Dashboard
- CPAN Digger
- CPAN Digger - CPAN Dashboard - CPAN Rocks
- CPAN Digger and the Hacktoberfest
- CPAN Digger explained
- CPAN Monitor
- CPAN for older versions of Perl
- Contributing to a Perl module on CPAN (using vim and GitHub)
- Contributing to the Open Source Perl Ecosystem
- Core Perl documentation and CPAN module documentation
- Fetching META data from Meta CPAN
- How to add images to the documentation of Perl modules on CPAN
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- How to download a Perl module from CPAN
- How to fetch the CPAN dependency tree of a Perl module?
- Installing a Perl Module from CPAN on Windows, Linux and Mac OSX
- Introducing CPANCover - Showing Test coverage reports of Perl modules
- List all the Perl modules and distributions in a name-space using Meta CPAN
- Minimal requirement to build a sane CPAN package
- Monitoring the most recent uploads to CPAN
- New on CPAN - week ending on 2017-08-20
- New on CPAN - week ending on 2017-08-27
- Perl modules on CPAN having links to VCS and having CI configured
- RT.CPAN.ORG is closing
- What you need to know about CPAN
- Writing Makefile for -- NOT OK
- search.cpan.org - video
cpan
- CPAN Testers and CPAN Ratings - video
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
- How to install Perl modules on FreeBSD
- Installing Perl modules using cpan - video
- Pinto -- A Custom CPAN In A Box
- Some interesting CPAN modules - video
- Using procedural Perl modules - video
- What is CPAN? - video
CPAN Testers
- CPAN Testers or CI system?
- MetaCPAN and the CPAN Testers
CPAN::Meta::Spec
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
CPANCover
- How to contribute to an Open Source Perl project
- Introducing CPANCover - Showing Test coverage reports of Perl modules
Cpanel::JSON::XS
- Command line counter with JSON backend
- Comparing the speed of JSON decoders
- JSON in Perl
- Using the Open Weather Map API with Perl
cpanm
- Bitbucket Pipelines testing Perl projects
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
- How to install Perl modules on FreeBSD
- Install Perl modules without root rights on Linux Ubuntu 13.10 x64
- Installing a Perl Module from CPAN on Windows, Linux and Mac OSX
- Virtualenv in Perl 5 - install 2 different versions of the same module
- cpanm
cpanminus
- Virtualenv in Perl 5 - install 2 different versions of the same module
- cpanm
CPANTS
- Improve Kwalitee (Pod::Tree 1.25)
cpxxxan
- CPAN for older versions of Perl
croak
- Accessor with type constraint
cron
- Get CPANstats from MetaCPAN using cron
- How to run a Perl script automatically every N hours
crypt
- Storing Password in an easy and secure way using Perl
- crypt
Crypt::DH
- Net::SSH::Perl - Login Hang Resolved!
Crypt::PBKDF2
- Storing Password in an easy and secure way using Perl
Crypt::Random
- Generate random numbers in Perl with the rand() function
Crypt::SSLeay
- Crypt::SSLeay - 500 Can't connect to ____ (Crypt-SSLeay can't verify hostnames)
- Crypt::SSLeay and HTTPS_PROXY Problem
CSV
- CSV_XS ERROR: 2034 - EIF - Loose unescaped quote @ rec 5 pos 194
- Calculating bank balance, take two: DBD::CSV
- How to calculate the balance of bank accounts in a CSV file, using Perl?
- How to read a CSV file using Perl?
- How to replace a column in a CSV file using Perl
- Multiple command line counters with plain TSV text file back-end
- One-liner sum of column in CSV - video
- Process CSV file - video
- Process CSV file short version - video
- Process CSV file using Text::CSV_XS - video
- Reading CSV file as many hash-es
- Split CSV file into multiple small CSV files
- Split up and flatten CSV file
Cucumber
- Exploring BDD in Perl - using Test::BDD::Cucumber
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 1
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 2
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 3
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 4
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 5 - with Erik Hülsmann
curl
- A Simple way to download many web pages using Perl
cwd
- Current working directory in Perl (cwd, pwd)
- The 19 most important file-system tools in Perl 5
Cwd
- Current working directory in Perl (cwd, pwd)
- Get absolute path (aka. canonical path) using abs_path or canonpath
- Get real path (absolute path) from symbolic link (aka. softlink)
- How to change directory (chdir, cd) in Perl?
- How to create a Perl Module for code reuse?
- More UNIX commands - video
- The 19 most important file-system tools in Perl 5
Daemon::Control
- Create Daemon (service) from a Perl script using Daemon::Control
Dancer
- Books
- Building a blog engine using Perl Dancer
- Counter with Dancer Sessions
- Counter with Dancer using in-memory SQLite database
- Dancer 1 Skeleton
- Dancer 1 echo using GET and testing GET
- Dancer 1 echo using POST and testing POST
- Dancer 1 test Hello World
- Dancer Simple Session and testing a session
- Dancer in Docker
- Dancer, the light-weight Perl web framework
- Getting started with Perl Dancer - Creating an Echo application
- Getting started with Perl Dancer on Digital Ocean
- Hello World with Perl Dancer
- Migrating (the Perl Maven site) from Dancer 1 to Dancer2
- Modern Web with Perl
dancer2
- Hello World with Dancer2
Dancer2
- Add and retrieve items - MongoDB, Dancer and Testing!
- Ajax and Dancer 2
- Counter using Dancer2 and Redis in a Docker container
- Dancer2: Before and After Hooks
- Dancer2: Configuration
- Dancer2: Exercise 1 - Calculator, Counter
- Dancer2: Exercise 2 - Multi-Counter, Random redirection
- Dancer2: Exercise 3 - Simple Single-user TODO list AP
- Dancer2: Hello World
- Dancer2: Hello World with Visual Studio Code
- Dancer2: Install Perl on Linux and Mac OSX
- Dancer2: Install Perl, editor, Dancer2
- Dancer2: Logging
- Dancer2: More route parameters
- Dancer2: Plackup reload on Windows and Linux
- Dancer2: Process GET and POST requests
- Dancer2: Return JSON
- Dancer2: Route parameters and sending 404 manually
- Dancer2: Sessions
- Dancer2: Show current time
- Dancer2: Show errors during development
- Dancer2: Skeleton
- Dancer2: Solution 2 - Random redirect
- Dancer2: Solution 2 - Route-based Multi-Counter
- Dancer2: Solution 3 - Simple Single-user TODO list AP
- Dancer2: Solution: 1 - Calculator
- Dancer2: Solution: 1 - Calculator fixing
- Dancer2: Solution: 1 - Counter
- Dancer2: Template Tiny
- Dancer2: Template Toolkit
- Dancer2: Testing 404 and 500 error responses
- Dancer2: Testing Hello World
- Dancer2: Upload file
- Hello World with Dancer2
- Introducing CPANCover - Showing Test coverage reports of Perl modules
- Migrating (the Perl Maven site) from Dancer 1 to Dancer2
- Password protecting web pages in Dancer 2
- Silencing the noisy Dancer tests
- Single Page Application with Perl Dancer and AngularJS
Dancer2::Core::Request::Upload
- Uploading files using Dancer
Dancer2::Plugin
- Finding all Plack Middleware or Perl::Critic Policies
Dancer2::Plugin::Auth::Extensible
- Password protecting web pages in Dancer 2
Dancer::Plugin
- Finding all Plack Middleware or Perl::Critic Policies
Dancer::Response
- Dancer 1 test Hello World
Dashboard
- CPAN Digger - CPAN Dashboard - CPAN Rocks
DATA
- Check several regexes on many strings
Data::Dump
- Merge hashes of arrays
Data::Dumper
- Array references in Perl
- Data Serialization in Perl
- Debugging Perl scripts
- Dumping a hash - video
- Multi dimensional arrays in Perl
- Multi dimensional hashes in Perl
- Perl Arrays
Data::Dumper::Sortkeys
- Caching data using the Cache module
Data::Entropy
- Generate random numbers in Perl with the rand() function
Data::ICal
- Generate Calendar in ICal format
Data::ICal::Entry::Event
- Generate Calendar in ICal format
Data::Netflow
- New on CPAN - week ending on 2017-08-27
Data::Serializer
- Data Serialization in Perl
Data::Tersify
- New on CPAN - week ending on 2017-08-20
Data::Trace
- The value of a clean Continuous Integration (CI) system (for Data-Trace)
Datadog
- Statsd with Perl
DateTime
- 3: Dave Rolsky, author of DateTime and tons of other modules
- Classes as constraints in Moose
- Common DateTime operations
- Epoch - The creation of the world
- File modify date - When was a file last changed?
- Generate Calendar in ICal format
- The year of 19100
DateTime::Duration
- Common DateTime operations
- Generate Calendar in ICal format
DateTime::Event::Cron
- How to install Perl modules on FreeBSD
DateTime::Format::Duration
- Common DateTime operations
DateTime::Format::ICal
- Generate Calendar in ICal format
DateTime::Format::ISO8601
- Common DateTime operations
DateTime::Format::Strptime
- Common DateTime operations
DateTime::Tiny
- Add a date stamp to the items in the database
Dave Miller
- 10: Dave Miller, the leader of the Bugzilla project
Dave Rolsky
- 3: Dave Rolsky, author of DateTime and tons of other modules
DBD
- DBI - Database Independent Interface for Perl
DBD::CSV
- Calculating bank balance, take two: DBD::CSV
DBD::Mock
- GitLab CI Pipeline for Perl DBD::Mock using Module::Build
DBD::Oracle
- ORA-03124: two-task internal error (DBD ERROR: OCIStmtExecute)
- Segmentation Fault (core dumped) while connecting to Oracle using DBD::Oracle
DBD::SQLite
- A command line counter with database back-end using DBIx::Class
- Process status in SQLite
- Simple Database access using Perl DBI and SQL
DBI
- Calculating bank balance, take two: DBD::CSV
- Counter with Dancer using in-memory SQLite database
- DBI - Database Independent Interface for Perl
- Segmentation Fault (core dumped) while connecting to Oracle using DBD::Oracle
- Simple Database access using Perl DBI and SQL
DBIC
- A command line counter with database back-end using DBIx::Class
DBIx::Class
- A command line counter with database back-end using DBIx::Class
dbmclose
- dbmclose
dbmopen
- dbmopen
DCI
- 8: Chad (Exodist) Granum, author of the Fennec testing tool
DDG
- Neat trick to jump from search.cpan.org to metacpan.org
debug
- Debugging Perl scripts
- Using the built-in debugger of Perl
debugger
- History in the Perl debugger, make the up arrow work
- Using the built-in debugger of Perl
debugging
- Debugging Perl scripts
declaration
- Variable declaration in Perl
decode
- length
decode_json
- JSON in Perl
- Start writing the Markua parser in Perl
default
- $_ the default variable of Perl
- Moo attributes with default values
- Moo with array reference as attributes - with or without default values
- Moo with hash reference as attributes - with or without default values
defined
- defined
- defined
- undef - defined - true -false
- undef on Perl arrays and hashes
- undef, the initial value and the defined function of Perl
defined or
- What's new in Perl 5.10? say, //, state
del
- How to remove, copy or rename a file with Perl
DELETE
- Deleting item using Ajax request with DELETE and OPTIONS
delete
- How to eliminate a value in the middle of an array in Perl?
- How to remove, copy or rename a file with Perl
- Updating MongoDB using Perl
- What is autovivification?
- delete an element from a hash
- exists, delete in hash - video
- undef on Perl arrays and hashes
dependencies
- How to fetch the CPAN dependency tree of a Perl module?
DESCRIPTION
- Packaging a Perl script and a Perl module
DESTROY
- DESTROY
- The destructor called DESTROY
DESTRUCT
- DESTRUCT
destructor
- The destructor called DESTROY
Devel::Cover
- Add more tests to the Markua parser
- Add test coverage reporting with Coveralls to Markua Parser in Perl
- Check test coverage - add compile tests
- Introducing CPANCover - Showing Test coverage reports of Perl modules
- List::GroupBy
- Test coverage report with Devel::Cover for the Markua Parser
Devel::hdb
- Debugging Perl with hdb
Devel::NYTProf
- Profiling and 100 times speed improvement
- Profiling part of a Perl application
Devel::Size
- How much memory do Perl variables use?
- Memory use of sparse arrays in Perl
DevOps
- Levels of security using (R)?ex
df
- Diskspace usage: df in Perl - video
dfportable
- Diskspace usage: df in Perl - video
diag
- Test diagnostic messages using diag, note, and explain
diagnostics
- Safety net (use strict; use warnings;) - video
- use diagnostic; or use splain
- use strict; and warnings; but no diagnostics
die
- Accessor with type constraint
- Open and read from text files
- Open or die - video
- What does die do?
- Writing to files with Perl
- die
die warn exit
- die, warn, exit - video
difference
- Sets in Perl using Set::Scalar
Digest::MD5
- Storing Password in an easy and secure way using Perl
Digest::SHA
- Storing Password in an easy and secure way using Perl
Digger
- CPAN Digger - CPAN Dashboard - CPAN Rocks
digit
- Regex matching digits
Digit
- Regex matching digits
Digital Ocean
- Cloud automation at Digital Ocean using Perl
- Getting started with Perl Dancer on Digital Ocean
DigitalOcean
- Cloud automation at Digital Ocean using Perl
- Digital Ocean API using Perl
dir
- Unix and DOS commands - video
Dir::Self
- How to add a relative directory to @INC
directory tree
- Finding files in a directory tree using Perl
dirname
- How to add a relative directory to @INC
- How to create a Perl Module for code reuse?
- More UNIX commands - video
- The 19 most important file-system tools in Perl 5
dist.ini
- Distribution directory layout
- How to run the tests of a typical Perl module
Dist::Zilla
- Add GitHub Actions (CI) to Graphics-Toolkit-Color Perl module
- Adding list of contributors to the CPAN META files
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Tools to package Perl scripts, modules, and applications
- Using GitHub Actions (CI) to locate missing test dependencies in Dist::Zilla::PERLSRVDE
distinct
- Unique values in an array in Perl
- Unique values in an array reference in Perl
do
- Exception handling in Perl: How to deal with fatal errors in external modules
- What is @INC in Perl?
- do
- do
Docker
- Counter using Dancer2 and Redis in a Docker container
- Dancer in Docker
- Distributing a Perl script using Docker container
- Getting started with Perl on Docker
- Hello World with Mojolicious in Docker
docker-container
- Counter using Dancer2 and Redis in a Docker container
documentation
- Core Perl documentation and CPAN module documentation
- POD - Plain Old Documentation
done_testing
- Forget your plan, just call done_testing
Dotenv
- .env - the dot env application configuration file
download
- Download and install Perl
du
- disk usage: du in Perl - video
dump
- Merge hashes of arrays
- dump
Dumper
- Dumping a hash - video
- Hash of Arrays in Perl
DumpFile
- Write YAML file
duplicate
- Unique values in an array in Perl
DWIM Perl
- DWIM Perl for Linux; $^X vs $Config{perlpath}; Relocatable Perl; Test::Differences
- Download and install Perl
- Getting started with Perl Dancer - Creating an Echo application
- Installing a Perl Module from CPAN on Windows, Linux and Mac OSX
- Welcome and Installation - video
e
- Increase numbers in a file
- Perl Regex superpowers - execute code in substitution - what are /e and /ee ?
e-book
- Advanced Perl Maven book
- Beginner Perl Maven e-book - video
- Perl Books
- Perl Maven Cookbook
- Perl Maven Products
- Test Automation using Perl e-book
each
- each
- each - iterate over Perl hash elements pair-by-pair
echo
- Getting started with Perl Dancer - Creating an Echo application
Eclipse
- Editors and IDEs for Perl developers - video
- Perl Editor
editor
- Perl Editor
ee
- Increase numbers in a file
- Perl Regex superpowers - execute code in substitution - what are /e and /ee ?
else
- Conditional statements, using if, else, elsif in Perl
- Switch-Case statement in Perl 5
ELSE
- Dancer2: Template Tiny
else if
- Conditional statements, using if, else, elsif in Perl
elsif
- Conditional statements, using if, else, elsif in Perl
- Switch-Case statement in Perl 5
emacs
- Editors and IDEs for Perl developers - video
- Perl Editor
email
- Fetching data from YouTube using Perl
Email::Address
- Adding the To: field to the MongoDB database
- Email validation using Regular Expression in Perl
- Putting the email in MongoDB - part 1
Email::Folder
- Indexing e-mails in an mbox
Email::Send::SMTP::Gmail
- Fetching data from YouTube using Perl
Email::Sender::Transport::SMTP
- Sending HTML e-mail using Email::Stuffer
Email::Simple
- Adding Date, Size, CC, and Message-ID
Email::Stuffer
- Sending HTML e-mail using Email::Stuffer
Email::Valid
- Email validation using Regular Expression in Perl
embedded characters
- Strings in Perl: quoted, interpolated and escaped
employment
- Want a job abroad? Improve your language and communication skills!
Encode
- Web Scraping TED - information about a specific talk
- length
encode_json
- JSON in Perl
encoding
- Open and read from text files
- Writing to files with Perl
END
- Dancer2: Template Tiny
- END
- END block - running code after the application has ended
- Introduction to Template::Toolkit
- The destructor called DESTROY
endgrent
- endgrent
endhostent
- endhostent
endnetent
- endnetent
endprotoent
- endprotoent
endpwent
- endpwent
endservent
- endservent
English
- Chomp and $/, the Input Record Separator
- English
eof
- EOF - End of file in Perl
- The diamond operator <> of Perl
- eof
- seek - move the position in the filehandle in Perl
epoch
- Epoch - The creation of the world
eq
- Compare Values - video
- Comparing scalars in Perl
- eq - Comparing if the two sides are equal as strings.
Equality Operators
- Equality Operators
error
- Collecting errors while parsing Markua in Perl 5 - disregarding empty rows
- Common Errors and Warnings - video
escape character
- Strings in Perl: quoted, interpolated and escaped
eval
- Echo server with logging and timeout
- Exception handling in Perl: How to deal with fatal errors in external modules
- Protecting from crash
- String-eval in Perl
- eval
evalbytes
- evalbytes
Excel
- How to create an Excel file with Perl?
- Read dates from Excel file using Perl
Excel::Writer::XLSX
- How to create an Excel file with Perl?
exec
- exec
Exercise
- Exercise: Hello World - video
- Exercise: Regexes 1 - video
exercise
- Exercise: display unique rows of a file - video
- Exercise: improve number guessing game - video
- Exercise: improve the color selector - video
- Exercise: more statistics - video
- Exercise: number guessing game - video
- Exercise: number guessing in sub - video
- Exercise: rectangular - video
- Exercise: sort mixed string - video
- Exercise: write report to file - video
exerise
- Exercise: add more statistics - video
exists
- What is autovivification?
- delete an element from a hash
- exists - check if a key exists in a hash
- exists, delete in hash - video
exit
- Capture STDOUT and STDERR of external program using Capture::Tiny
- How to exit from a Perl script?
- exit - How to exit from a Perl script?
exp
- exp
Expect
- Expect_before amd expect_after with perl and expect.pm
explain
- Test diagnostic messages using diag, note, and explain
explode
- Perl split - to cut up a string into pieces
Exponentiation
- Exponentiation
Exporter
- Exporting and importing functions easily
- How to create a Perl Module for code reuse?
ExtUtils::Embed
- undefined reference to boot_DynaLoader
ExtUtils::MakeMaker
- Add META data to a CPAN distribution (Pod::Tree 1.19)
- Adding list of contributors to the CPAN META files
- Creating Makefile.PL and a CPAN distribution for the Markua Parser
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- How to declare requirements of a CPAN distribution?
- Makefile.PL of ExtUtils::MakeMaker
- Minimal requirement to build a sane CPAN package
- Tools to package Perl scripts, modules, and applications
false
- Boolean values in Perl
- True False - video
- false
- false
- undef - defined - true -false
FastCGI
- Which is better perl-CGI, mod_perl or PSGI?
fat arrow
- Hashes in Perl
fat comma
- Hashes in Perl
FATAL warnings
- Scalar variables
favicon.ico
- Serving static files such as favicon.ico and robots.txt using Plack
fc
- fc
fcntl
- fcntl
Fcntl
- Open file to read and write in Perl, oh and lock it too
- Read section of a file
- seek - move the position in the filehandle in Perl
Fennec
- 8: Chad (Exodist) Granum, author of the Fennec testing tool
fetchrow_array
- Simple Database access using Perl DBI and SQL
fetchrow_hashref
- Simple Database access using Perl DBI and SQL
FFI
- Creating a Perl binding to a C library using FFI with Sawyer X
FH
- Old style open - video
FIFO
- Using a queue in Perl
File::Basename
- Changing @INC relative path - video
- Construct the path to a file in the same directory as the current script
- How to add a relative directory to @INC
- How to create a Perl Module for code reuse?
- More UNIX commands - video
- Sending email with attachments - video
- The 19 most important file-system tools in Perl 5
File::Copy
- How to remove, copy or rename a file with Perl
- More UNIX commands - video
File::Find
- File::Find - video
- More UNIX commands - video
File::Find::Rule
- Traversing a directory tree, finding required files
File::HomeDir
- File::HomeDir - video
- Using Twitter, sending Tweets from a Perl script
File::Path
- More UNIX commands - video
- Remove directory tree recursively with Perl
File::Slurp
- How to replace a string in a file with Perl
- Sending email with attachments - video
- slurp mode - reading a file in one step
File::Spec
- Changing @INC relative path - video
- Construct the path to a file in the same directory as the current script
- File::Spec - video
- Get absolute path (aka. canonical path) using abs_path or canonpath
- How to add a relative directory to @INC
- The 19 most important file-system tools in Perl 5
File::stat
- How to get the size of a file in Perl
File::Temp
- Testing Perl CGI application
- The 19 most important file-system tools in Perl 5
fileno
- fileno
files
- Appending to files
- Getting started with Net::Server - building an echo server
- Mojolicious::Lite with embedded templates
- Release the Markua::Parser to CPAN
Filesys::DfPortable
- Diskspace usage: df in Perl - video
- Reporting diskspace usage on a mail server - video
Filesys::DiskUsage
- disk usage: du in Perl - video
filter
- Filtering values using Perl grep
- Unique values in an array in Perl
- Unique values in an array reference in Perl
findAndModify
- Command line counter in Perl with MongoDB as storage
FindBin
- Changing @INC relative path - video
- How to add a relative directory to @INC
- The 19 most important file-system tools in Perl 5
FindBin::Bin
- Construct the path to a file in the same directory as the current script
FindBin::libs
- How to add a relative directory to @INC
first
- Fast lookup by name or by date - Array - Hash - Linked List
- Find the first element in an array in Perl that satisfies a condition
- Search for hash in an array of hashes
first_index
- How to get the index of specific element (value) of an array?
Flickr::API
- Fetching Pictures from Flickr using Perl
flip-flop
- A bunch of Perl one-liners to edit HTML files
Floating-point Arithmetic
- Floating-point Arithmetic
flock
- Open file to read and write in Perl, oh and lock it too
- flock
flush
- Immediate writing to file - flushing in Perl without buffering
foo
- Acme::MetaSyntactic or how to get rid of foo and bar?
for
- Bug in the for-loop of Perl? - B::Deparse to the rescue
- How to freak-out your co-workers with a for loop?
- Perl for loop explained with examples
foreach
- Bug in the for-loop of Perl? - B::Deparse to the rescue
- Perl Arrays
- Perl for loop explained with examples
- foreach loop over list - video
FOREACH
- Dancer2: Template Tiny
- Introduction to Template::Toolkit
fork
- Forking, Process ID, Parent Process ID, init
- Have exceeded the maximum number of attempts (1000) to open temp file/dir
- How to check if a child process is still running in Perl?
- Random numbers in forked processes
- Speed up calculation by running in parallel
- Test code which is using fork
- Using fork in Perl to spread load to multiple cores
- Variable "..." will not stay shared ...
- fork
FORMAT
- ref - What kind of reference is this variable?
format
- Add attributes to Markua - round 1
- format
formline
- formline
FreeBSD
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
- How to install Perl modules on FreeBSD
FreezeThaw
- Data Serialization in Perl
from_json
- Get CPANstats from MetaCPAN using cron
function
- Subroutines and functions in Perl
g
- Global substitution with regexes - video
Games::Sudoku::Component
- Sudoku in Perl
GD
- Drawing images with Perl using GD::Simple
GD::Graph
- Creating bar graphs using Perl GD::Graph
GD::Simple
- Drawing images with Perl using GD::Simple
ge
- Comparing scalars in Perl
- ge - Greater than or equal. Comparing values as strings.
Gedit
- Editors and IDEs for Perl developers - video
Geo::IP
- Using Travis-CI and installing Geo::IP on Linux and OSX
GET
- Add and retrieve elements - jQuery + Ajax
- Checking a GitHub URL for existence
- Dancer 1 echo using GET and testing GET
- Dancer2: Process GET and POST requests
- Set HTTP headers with WWW-Mechanize
get
- Get CPANstats from MetaCPAN using cron
- Hello World with Dancer2
getc
- getc
getcwd
- Current working directory in Perl (cwd, pwd)
getgrent
- getgrent
getgrgid
- getgrgid
getgrnam
- getgrnam
gethostbyaddr
- gethostbyaddr
gethostbyname
- gethostbyname
gethostent
- gethostent
getline
- Reading CSV file as many hash-es
getline_hr
- Reading CSV file as many hash-es
getlogin
- getlogin
getnetbyaddr
- getnetbyaddr
getnetbyname
- getnetbyname
getnetent
- getnetent
Getopt::Long
- Advanced usage of Getopt::Long for accepting command line arguments
- Create Linux user account - video
- How to process command line arguments in Perl using Getopt::Long
- Process command line using Getopt::Long (screencast) - video
- Process command line using Getopt::Long - video
- Sending email with attachments - video
GetOpt::Long
- CLI - Command Line Interface in Perl
GetOptions
- How to process command line arguments in Perl using Getopt::Long
getpeername
- getpeername
getpgrp
- getpgrp
getppid
- Forking, Process ID, Parent Process ID, init
- getppid
getpriority
- getpriority
getprotobyname
- getprotobyname
getprotobynumber
- getprotobynumber
getprotoent
- getprotoent
getpwent
- getpwent
getpwnam
- getpwnam
getpwuid
- getpwuid
getservbyname
- getservbyname
getservbyport
- getservbyport
getservent
- getservent
getsockname
- getsockname
getsockopt
- getsockopt
getter
- Attribute types in Perl classes when using Moose
- Core Perl OOP: attributes, getter - setter
- Object Oriented Perl using Moose
gettext
- gettext function not found. Please install libintl at Makefile.PL
Git
- 2: Michael Schwern on test automation and Git
- Fix the documentation of the MetaCPAN::Client
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Rename the SCO cloning project
git
- Becoming a co-maintainer of a CPAN-module
- Becoming a co-maintainer of a CPAN-module - the first steps (Pod::Tree 1.17_01, 1.18)
- Contributing to a Perl module on CPAN (using vim and GitHub)
- Start writing the Markua parser in Perl
GitHub
- Adding GitHub Actions to Test2::Harness::UI
- CI for CPAN modules
- CPAN Digger explained
- Contributing to the Open Source Perl Ecosystem
- Fix the documentation of the MetaCPAN::Client
- Fixing test failure on Windows - Properly quoting regexes - Accepting GitHub pull request
- GitHub Actions CI job for Perl Test::Class - checking downstream dependencies as well
- GitHub Actions for CPAN modules
- GitHub Actions for Geo::TCX
- GitHub Actions for MooX-Role-CachedURL
- Looking at a specific commit in GitHub
- Separate release branch for App::Puppet::Environment::Updater
- Setup GitHub Actions for CPAN modules
- Supporting Perl Creators via Patreon, GitHub, and more
- The value of a clean Continuous Integration (CI) system (for Data-Trace)
- Using GitHub Actions (CI) to locate missing test dependencies in Dist::Zilla::PERLSRVDE
Github
- Add GitHub Actions (CI) to Graphics-Toolkit-Color Perl module
- Adding GitHub Actions to Math::Numerical
- Building a static blog using Blio and Github
- Contributing to a Perl module on CPAN (using vim and GitHub)
- GitHub Actions for Pinto-Remote-SelfContained
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Show error logs on Github Actions - Install developer dependencies first (Test::CSS)
GitHub Actions
- CPAN Testers or CI system?
- Periodic CI for dormant code
GitHub pages
- Blogging with Riji
GitLab
- CPAN Digger explained
- GitLab CI Pipeline for Perl DBD::Mock using Module::Build
- GitLab CI for Perl projects
GitLab CI
- Periodic CI for dormant code
given
- Switch-Case statement in Perl 5
- Switching in Perl 5.10
glob
- File globbing - video
- Filtering values using Perl grep
- glob
- rename files - video
GLOB
- ref - What kind of reference is this variable?
- usage: GLOB->new([FILENAME [,MODE [,PERMS]]])
global symbol
- Global symbol requires explicit package name
gmtime
- Epoch - The creation of the world
- The year of 19100
- The year of 19100 - video
- gmtime
Gory details of parsing quoted constructs
- Gory details of parsing quoted constructs
goto
- goto
GraphViz2
- Visualize Perl class hierarchies as a graph using GraphViz2::Parse::ISA
GraphViz2::Parse::ISA
- Visualize Perl class hierarchies as a graph using GraphViz2::Parse::ISA
grep
- Filtering values using Perl grep
- Find the first element in an array in Perl that satisfies a condition
- How to get the index of specific element (value) of an array?
- How to grep a file using Perl
- Search for hash in an array of hashes
- The diamond operator <> of Perl
- Unique values in an array in Perl
- Unique values in an array reference in Perl
- grep
gt
- Compare Values - video
- Comparing scalars in Perl
- Comparison Operators - video
- gt - Greater than. Comparing values as strings.
Gtk2
- GUI with Perl for desktop applications
Hacktoberfest
- CPAN Digger and the Hacktoberfest
Handlebars
- Replace manual HTML generation by the use of Handlebars
has
- Moose constructor
- Moose testing type constraint
hash
- Count the frequency of words in text using Perl
- Creating a hash from an array in Perl
- Hashes in Perl
- How to insert a hash in another hash in Perl
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- Multi dimensional hashes in Perl
- Perl Hash
- Perl hash in scalar and list context
- Printing hash of hashes of arrays by the array
HASH
- How to dereference a reference to a hash or to an array in Perl
- Moo with hash reference as attributes - with or without default values
- ref - What kind of reference is this variable?
help
- How to get Help for Perl?
- The 11 Most useful Perl sites
hex
- hex
hook
- Refactoring Dancer 2 app, using before hook
howmany
- What return is expected from a function?
html
- Convert Markdown to HTML
HTML5
- Create the search.cpan.org look and feel
HTML::TableExtract
- How to extract a column using HTML::TableExtract
HTML::TreeBuilder
- Web scraping with HTML::TreeBuilder
HTTP
- Checking a GitHub URL for existence
- Set HTTP headers with WWW-Mechanize
HTTP::Request::Common
- Basic Authentication with LWP::UserAgent and HTTP::Request::Common
- Send data to Elasticsearch using Perl LWP::UserAgent
- Testing PSGI based web applications using Plack::Test
HTTP::Tiny
- A Simple way to download many web pages using Perl
HTTPS_PROXY
- Crypt::SSLeay and HTTPS_PROXY Problem
Hypnotoad
- Deploying a Mojolicious Application using Hypnotoad and Apache
i
- Case insensitive regexes - video
I/O Operators
- I/O Operators
ICal
- Generate Calendar in ICal format
IDE
- Perl Editor
Identifier parsing
- Identifier parsing
IF
- Dancer2: Template Tiny
- Introduction to Template::Toolkit
if
- Conditional statements, using if, else, elsif in Perl
- Short Circuit - video
- Statement modifiers: reversed if statements
- Switch-Case statement in Perl 5
- The 'if' statement - video
Image::ExifTool
- Adding custom tags with Image::ExifTool
- Adding filename to IPTC data and-or exif data
- Embed ICC Color Profile in JPEG
- Exif ColorSpace tag value 2 is wrong?
- ExifTool versions and xmp metadata
- Extra information in Canon EOS 350 .CR2 after using Digital Photo Professional
- How to Uninstall ExifTool on Mac OSX
- How to remove thumbnail from a jpeg using Image::ExifTool
- Image::ExifTool - Writing into IPTC-fields
- Image::ExifTool IPTC UTF-8 Support?
- Image::ExifTool: How to change file creation date?
- Perl syntax to inject external XMP data into image files
- Running exiftool in Mac OS X
- Script to restore EXIF data from saved JPEGs (After image editing)
- Unicode File Name Support - Suggested Solution
- Using the exiftool library from php (in place of native php function)
Imager
- Imager: How to remove the alpha channel?
- Linking Imager and libjpeg on MacOS-X
import
- Exporting and importing functions easily
- How to create a Perl Module for code reuse?
- Restrict the import by listing the functions to be imported
- What is the difference between require and use in Perl? What does import do?
- import
IN
- Dancer2: Template Tiny
- Introduction to Template::Toolkit
include
- Markua resources: Include files
INCLUDE
- Dancer2: Template Toolkit
INCLUDE_PATH
- Introduction to Template::Toolkit
indentation
- Conditional statements, using if, else, elsif in Perl
index
- Analyze Apache log file - video
- String functions: index - video
- String functions: length, lc, uc, index, substr
- index
Index/Value Array Slices
- Index/Value Array Slices
infinite loop
- Perl for loop explained with examples
- while loop
INIT
- INIT
- INIT
insert
- Getting started with MongoDB using Perl - insert and simple update
insert_one
- Getting started with MongoDB using Perl - insert and simple update
install
- Download and install Perl
- cpanm
instance
- Attribute types in Perl classes when using Moose
- Object Oriented Perl using Moose
Int
- Moose type constraints
int
- Number Guessing game
- rand() and int() - video
integer
- Number Guessing game
Integer Arithmetic
- Integer Arithmetic
interpolation
- Strings in Perl: quoted, interpolated and escaped
intersection
- Sets in Perl using Set::Scalar
interview
- 10: Dave Miller, the leader of the Bugzilla project
- 1: Jeffrey Thalhammer, author of Perl::Critic and Pinto
- 2: Michael Schwern on test automation and Git
- 3: Dave Rolsky, author of DateTime and tons of other modules
- 4: Tadeusz Sośnierz author of the Perl 6 Pod Parser and Panda, the Perl 6 module installer
- 5: Stevan Little, author of Moose and Moe
- 6: John SJ Anderson, a biologist turned into sysadmin
- 7: Jay Hannah, Chief Ticket Monkey of the Perl Mongers
- 8: Chad (Exodist) Granum, author of the Fennec testing tool
- 9: Neil Bowers - PAUSE and CPAN admin
- Chris Nandor
Interviews
- Interviews with Perl Developers
invitation
- Invitation
IO
- ref - What kind of reference is this variable?
IO::Prompter
- Prompt for user input using IO::Prompter
- Prompt, read from STDIN, read from the keyboard in Perl
IO::Socket::INET
- IO::Socket::INET configuration failed
ioctl
- ioctl
IP
- Is this IP in the given subnet?
IPC::Run
- How to provide STDIN to an external executable?
IPC::Run3
- How to provide STDIN to an external executable?
IPTC
- Image::ExifTool - Writing into IPTC-fields
IPv4
- What is my IP address, how to determine the IP address of your computer using Perl
IPv6
- What is my IP address, how to determine the IP address of your computer using Perl
is
- Getting started testing Perl module with Test2
- Moving over to Test::More
is_any
- Creating a testing module
- Implementing 'is_any' to test multiple expected values
is_deeply
- Comparing complex data-structures using is_deeply
- Start writing the Markua parser in Perl
is_number
- Automatic string to number conversion or casting in Perl
is_passing
- What is the status of the current test script?
isa
- Class as type constraint
- Classes as constraints in Moose
- Moose type constraints
ISBN
- ISBN - International Standard Book Number - with Perl
isnt
- Moving over to Test::More
JavaScript
- PSGI and AJAX for single-page applications
job interview
- How to prepare for a Perl job interview?
jobs
- Perl developer jobs
join
- Join - video
- join
- join
jQuery
- Add and retrieve elements - jQuery + Ajax
- Ajax and Dancer 2
- Convert list to table and add jQuery tablesorting with Date column
JSON
- Comparing the speed of JSON decoders
- Data Serialization in Perl
- Get CPANstats from MetaCPAN using cron
- How does the world wide web work?
- JSON in Perl
- Parsing NaN in JSON - JavaScript and Perl
- Send data to Elasticsearch using Perl LWP::UserAgent
- Web Scraping TED - information about a specific talk
JSON::MaybeXS
- Generate test expectations for the Markua parser
- JSON in Perl
- Start writing the Markua parser in Perl
JSON::Syck
- JSON in Perl
JSON::XS
- Comparing the speed of JSON decoders
- JSON in Perl
Kate
- Editors and IDEs for Perl developers - video
Key/Value Hash Slices
- Key/Value Hash Slices
Keyboard
- Perl Tk: Keyboard and Mouse events
kill
- kill
Komodo
- Editors and IDEs for Perl developers - video
- Perl Editor
LABEL:
- Check several regexes on many strings
lambda
- Python Lambda in Perl creating anonymous functions
last
- Check several regexes on many strings
- Loop controls: next last - video
- Loop controls: next, last, continue, break
- Using a queue in Perl
- while loop
last_insert_id
- Process status in SQLite
layout
- Dancer2: Template Toolkit
lc
- String functions: length, lc, uc, index, substr
- lc
lcfirst
- lcfirst
le
- Comparing scalars in Perl
- le - Less than or equal. Comparing values as strings.
length
- Length of an array in Perl
- Perl Arrays
- Scalar and List context in Perl, the size of an array
- String functions: length, lc, uc, index, substr
- length
less
- ANSI command line colors with Perl
lib
- Changing @INC - video
- Changing @INC relative path - video
- How to add a relative directory to @INC
- How to change @INC to find Perl modules in non-standard locations
- How to create a Perl Module for code reuse?
libintl
- gettext function not found. Please install libintl at Makefile.PL
license
- How to add the license field to the META.yml and META.json files on CPAN?
like
- Using 'like' to test without exact values
lines_utf8
- Increase numbers in a file
link
- Unix and DOS commands - video
- link
links
- How to get Help for Perl?
- The 11 Most useful Perl sites
lint
- Perl::Critic example - lint for Perl
Linux
- Dancer2: Plackup reload on Windows and Linux
- Download and install Perl
- How much memory does my Perl application use?
- How to build perl from source on Linux
list
- Scalar and List context in Perl, the size of an array
- Transforming a Perl array using map
LIST
- Conext sensitivity - video
List Operators (Rightward)
- List Operators (Rightward)
List value constructors
- List value constructors
List::AllUtils
- List and Array Utilities in Perl
List::GroupBy
- List::GroupBy
List::MoreUtils
- Check several regexes on many strings
- Does the 'all' function of List::MoreUtils really short-circuit?
- Filtering values using Perl grep
- How to get the index of specific element (value) of an array?
- List and Array Utilities in Perl
- List authors where the PAUSEID starts with a given letter
- Merge hashes of arrays
- Unique values in an array in Perl
List::Pairwise
- List and Array Utilities in Perl
List::Util
- Fast lookup by name or by date - Array - Hash - Linked List
- Find the first element in an array in Perl that satisfies a condition
- How to calculate factorial in Perl - n!
- List and Array Utilities in Perl
- Operations on value-pairs in Perl
- Search for hash in an array of hashes
- The easiest way to find the highest hash value without looping through all of them (max)
- min, max, sum in Perl using List::Util
List::UtilsBy
- List and Array Utilities in Perl
- The easiest way to find the highest hash value without looping through all of them (max)
listen
- listen
live
- Creating a Perl binding to a C library using FFI with Sawyer X
ln
- Get real path (absolute path) from symbolic link (aka. softlink)
- Unix and DOS commands - video
LoadFile
- Read YAML file
local
- How to capture and save warnings in Perl
- local
- slurp mode - reading a file in one step
local::lib
- Install Perl modules without root rights on Linux Ubuntu 13.10 x64
localtime
- Epoch - The creation of the world
- File modify date - When was a file last changed?
- The year of 19100
- The year of 19100 - video
- localtime
lock
- lock
log
- log
Log::Colorize::Helper
- New on CPAN - week ending on 2017-08-20
Log::Log4perl
- Log::Log4perl layouts and formatting options
- Logging in modules with Log4perl the easy way
- Logging with Log4perl the easy way
- Refactoring the script and add logging
Log::Log4perl::Layout
- Log::Log4perl layouts and formatting options
Log::Log4perl::Level
- Logging in modules with Log4perl the easy way
- Logging with Log4perl the easy way
Logical And
- Logical And
Logical Defined-Or
- Logical Defined-Or
Logical Not
- Logical Not
Logical or and Exclusive Or
- Logical or and Exclusive Or
looks_like_number
- Automatic string to number conversion or casting in Perl
- Looks like number - video
- Type checking with Moo
loop
- Perl for loop explained with examples
- while loop
lower
- lc
ls
- Unix and DOS commands - video
ls -l
- Get real path (absolute path) from symbolic link (aka. softlink)
lstat
- lstat
lt
- Compare Values - video
- Comparing scalars in Perl
- Comparison Operators - video
- lt - Less than. Comparing values as strings.
ltrim
- trim - removing leading and trailing white spaces with Perl
Lvalue
- Lvalue substr - replace part of a string
LVALUE
- ref - What kind of reference is this variable?
LWP::Simple
- A Simple way to download many web pages using Perl
- Get CPANstats from MetaCPAN using cron
- Mocking function to fake environment
- Using the Open Weather Map API with Perl
LWP::UserAgent
- Basic Authentication with LWP::UserAgent and HTTP::Request::Common
- Basic Authentication without a Challenge
- Checking a GitHub URL for existence
- LWP::UserAgent and Basic Authentication
- Send data to Elasticsearch using Perl LWP::UserAgent
- Web Scraping TED - information about a specific talk
lynx
- Solution: Hello World part 2 (what is the difference between comment and POD?) - video
m
- Exercise: split HTTP GET request - video
- Fixing Assembly with Perl - video
- Solution: sort SNMP numbers - video
- Understanding dates using regular expressions
- m-for-matching - video
- multiple lines in regexes - video
m//
- m//
Mac OSX
- Download and install Perl
Mail::Sendmail
- Reporting diskspace usage on a mail server - video
make
- Becoming a co-maintainer of a CPAN-module
- Becoming a co-maintainer of a CPAN-module - the first steps (Pod::Tree 1.17_01, 1.18)
- Bitbucket Pipelines testing Perl projects
- Creating Makefile.PL and a CPAN distribution for the Markua Parser
- How to run the tests of a typical Perl module
- Packaging with Makefile.PL
Makefile.PL
- Becoming a co-maintainer of a CPAN-module
- Becoming a co-maintainer of a CPAN-module - the first steps (Pod::Tree 1.17_01, 1.18)
- Creating Makefile.PL and a CPAN distribution for the Markua Parser
- Distribution directory layout
- Getting started - Create skeleton for the SCO clone application
- How to run the tests of a typical Perl module
- Packaging with Makefile.PL
Making your module threadsafe
- Making your module threadsafe
MANIFEST
- Fixing the release. Twice in a row! (Pod::Tree 1.22 and 1.23)
- MANIFEST and MANIFEST.SKIP
map
- How to sort faster in Perl? (using the Schwartzian transform)
- Search for hash in an array of hashes
- Transforming a Perl array using map
- Traversing a directory tree, finding required files
- map
Map::Tube::Kolkatta
- New on CPAN - week ending on 2017-08-20
markdown
- Convert Markdown to HTML
Markua
- Add test coverage reporting with Coveralls to Markua Parser in Perl
- Enable Appveyor (CI on Windows) for the Perl 5 Markua Parser
- Implementing a Markua Parser in Perl 5
- Start writing the Markua parser in Perl
- Travis-CI for the Markua Parser project
Marpa
- Marpa Debugging
- Marpa for building parsers - a first look
Math::Random::Secure
- Generate random numbers in Perl with the rand() function
Math::TrulyRandom
- Generate random numbers in Perl with the rand() function
max
- The easiest way to find the highest hash value without looping through all of them (max)
- min, max, sum in Perl using List::Util
max_by
- The easiest way to find the highest hash value without looping through all of them (max)
maxstr
- min, max, sum in Perl using List::Util
MD5
- Benchmark: Refactoring MD5 calculation in Rex
Memcached::Client
- Command line counter with Memcached
Memcached::Server
- Command line counter with Memcached
Memoize
- Memoization - speeding up function calls by caching of return values
memory
- How much memory do Perl variables use?
- Out of memory!
- SQLite in Memory
Memory::Usage
- Eliminate circular reference memory-leak using weaken
- How much memory does my Perl application use?
- Memory usage and load time of Moose, Moo, and Class::Accessor
META
- Adding list of contributors to the CPAN META files
- Fetching META data from Meta CPAN
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
Meta::CPAN
- Hacking Meta::CPAN - the first steps
MetaCPAN
- 20 most popular Perl modules
- Add FAQ entry to MetaCPAN
- Adding news feed to MetaCPAN
- Building an open source clone of search.cpan.org using the MetaCPAN API
- CPAN Digger - CPAN Dashboard - CPAN Rocks
- CPAN, mcpan, MetaCPAN
- Contributing to the Open Source Perl Ecosystem
- Fetching META data from Meta CPAN
- Fix the documentation of the MetaCPAN::Client
- Get CPANstats from MetaCPAN using cron
- Hacking Meta::CPAN - the first steps
- Hacktoberfest 2019 and Perl
- How to contribute to an Open Source Perl project
- How to fetch the CPAN dependency tree of a Perl module?
- List all the Perl modules and distributions in a name-space using Meta CPAN
- Meta::CPAN
- MetaCPAN Task::Kensho - recommended Perl modules
- MetaCPAN URLs and Issues
- MetaCPAN and the CPAN Testers
- MetaCPAN is awesome!
- MetaCPAN recent uploads
- Neat trick to jump from search.cpan.org to metacpan.org
- Perl modules on CPAN having links to VCS and having CI configured
- Some MetaCPAN advanced search tricks using prefixes
- Start using the MetaCPAN API Client to fetch the list of most recently uploaded Perl modules
MetaCPAN::API
- Fetching META data from Meta CPAN
- How to fetch the CPAN dependency tree of a Perl module?
- List all the Perl modules and distributions in a name-space using Meta CPAN
- Start using the MetaCPAN API Client to fetch the list of most recently uploaded Perl modules
MetaCPAN::Client
- Start using the MetaCPAN API Client to fetch the list of most recently uploaded Perl modules
MetaCPAN::Clients
- List all the Perl modules and distributions in a name-space using Meta CPAN
method
- Inheritance and Method Modifiers in Moo
- Public and Private Methods in Moo-based Object Oriented Perl
MIME::Base64
- Basic Authentication without a Challenge
MIME::Lite
- Contributing to a Perl module on CPAN (using vim and GitHub)
- Sending email with attachments - video
min
- min, max, sum in Perl using List::Util
Minilla
- List::GroupBy
minstr
- min, max, sum in Perl using List::Util
mkdir
- Unix and DOS commands - video
- mkdir
mkpath
- More UNIX commands - video
mod_perl
- Which is better perl-CGI, mod_perl or PSGI?
module
- How to create a Perl Module for code reuse?
Module::Build
- Adding list of contributors to the CPAN META files
- GitLab CI Pipeline for Perl DBD::Mock using Module::Build
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Tools to package Perl scripts, modules, and applications
Module::Install
- Adding list of contributors to the CPAN META files
- Can't locate inc/Module/Install.pm in @INC (you may need to install the inc::Module::Install module) (@INC contains: ...)
- Github Actions for Module::Install and showing error log on Linux, Mac OSX, and Windows
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Makefile.PL of Module::Install
- Tools to package Perl scripts, modules, and applications
Modules
- Home-made coercion
- Type constraint instead of subtype
Modules::Build
- Build.PL of Module::Build
Modules::ProhibitEvilModules
- How to forbid certain Perl modules from use?
modulino
- Self testing Perl modules using the Modulino concept
Mojo::JSON
- JSON in Perl
Mojo::XMLRPC
- New on CPAN - week ending on 2017-08-27
Mojolicious
- Deploying a Mojolicious Application using Hypnotoad and Apache
- Hello World with Mojolicious in Docker
- Modern Web with Perl
- Mojolicious - a web framework with clouds, rainbows and unicorns
Mojolicious::Lite
- Adding a layout to a Mojolicious::Lite based application
- Counter with Mojolicious Lite
- Getting started with Mojolicious::Lite
Mojolicous
- Course Management Application in Mojolicious
- Course Management Application in Mojolicious - part 1
- Course Management Application in Mojolicious - part 2
- Course Management Application in Mojolicious - part 3
- Course Management Application in Mojolicious - part 4
- Course Management Application in Mojolicious - part 5
- Course Management Application in Mojolicious - part 6
- Course Management Application in Mojolicious - part 7
MongoDB
- Add and retrieve items - MongoDB, Dancer and Testing!
- Adding the To: field to the MongoDB database
- Command line counter in Perl with MongoDB as storage
- Command line phonebook with MongoDB and Moo
- Getting started with MongoDB using Perl - insert and simple update
- MongoDB and Perl
- MongoDB with Perl: insert, find and delete
- Putting the email in MongoDB - part 1
- Updating MongoDB using Perl
Moo
- Command line phonebook with MongoDB and Moo
- Inheritance and Method Modifiers in Moo
- Memory usage and load time of Moose, Moo, and Class::Accessor
- Moo - Minimalist Object Orientation for Perl
- Moo and required attributes
- Moo attribute predicate and clearer
- Moo attributes with default values
- Moo with array reference as attributes - with or without default values
- Moo with hash reference as attributes - with or without default values
- Moose-like type checking system for Moo
- OOP with Moo
- Public and Private Methods in Moo-based Object Oriented Perl
- Switching to Moo - adding command line parameters
- Type checking with Moo
- Writing Command line scripts and accepting command line parameters using Moo
Moose
- Attribute types in Perl classes when using Moose
- Classes as constraints in Moose
- Creating subtypes for Moose
- Memory usage and load time of Moose, Moo, and Class::Accessor
- Moose - The postmodern object system for Perl
- Moose constructor
- Moose testing type constraint
- Moose type constraints
- Moose: Testing the constructor
- Moose: coerce value to a subtype
- Moose: testing the setter and getter
- Object Oriented Perl using Moose
Moose::Util::TypeConstraints
- Moose: coerce value to a subtype
Moose::Util::TypeConstraints;
- Creating subtypes for Moose
MooX::late
- Moose-like type checking system for Moo
MooX::Options
- Command line phonebook with MongoDB and Moo
- Switching to Moo - adding command line parameters
- Writing Command line scripts and accepting command line parameters using Moo
MooX::Singleton
- Singleton Moo
MooX::Types::CLike
- Type checking with Moo
MooX::Types::MooseLike
- Type checking with Moo
morbo
- Deploying a Mojolicious Application using Hypnotoad and Apache
more
- ANSI command line colors with Perl
Mouse
- Perl Tk: Keyboard and Mouse events
move
- How to remove, copy or rename a file with Perl
- More UNIX commands - video
msgctl
- msgctl
msgget
- msgget
msgrcv
- msgrcv
msgsnd
- msgsnd
Multi-dimensional array emulation
- Multi-dimensional array emulation
Multiplicative Operators
- Multiplicative Operators
mv
- How to remove, copy or rename a file with Perl
- Unix and DOS commands - video
my
- "my" variable masks earlier declaration in same scope
- Global symbol requires explicit package name
- Package variables and Lexical variables in Perl
- Scalar values and variables - video
- Scalar variables
- Scope of Variables - video
- Scope of variables in Perl
- Variable declaration in Perl
- my
- my
Named Unary Operators
- Named Unary Operators
NaN
- Parsing NaN in JSON - JavaScript and Perl
natatime
- List authors where the PAUSEID starts with a given letter
ne
- Comparing scalars in Perl
- ne - Comparing if the two sides are NOT equal as strings.
Neil Bowers
- 9: Neil Bowers - PAUSE and CPAN admin
Net::Address::IP::Local
- What is my IP address, how to determine the IP address of your computer using Perl
Net::Appliance::Session
- Can't use Net::Appliance::Session inside a thread
Net::DNS
- DNS Name resolving - check DNS propagation with Perl
Net::DNS::Resolver::Mock
- New on CPAN - week ending on 2017-08-20
Net::LDAP
- Reading from LDAP in Perl using Net::LDAP
Net::Ping
- How to check if a server is live using Ping?
Net::Server
- Net::Server, a framework to build TCP/IP servers
Net::Server::Multiplex
- Chat server using Net::Server
Net::SFTP
- How to change default port in Net::SFTP?
- RSA authentication with Net-SFTP
- input must be 8 bytes long at DES.pm line 58. while using Net::SFTP
Net::SMTP::SSL
- IO::Socket::INET configuration failed
Net::SSH::Perl
- Net::SSH::Perl - Login Hang Resolved!
- Net::SSH::Perl: Channel open failure: 1: reason 4: when connecting to Cisco router
Net::Subnet
- Is this IP in the given subnet?
Net::Telnet
- Echo server with logging and timeout
- Testing a simple TCP/IP server using Net::Telnet
Net::Twitter
- Using Twitter, sending Tweets from a Perl script
Net::Whois::Raw
- Checking the whois record of many domains
new
- Core Perl OOP: Constructor arguments
- Moose constructor
- Moose testing type constraint
- OOP - Object Oriented Perl
- bless
newsletter
- Perl Maven Newsletter
next
- Check several regexes on many strings
- Loop controls: next last - video
- Loop controls: next, last, continue, break
- Understanding dates using regular expressions
Nginx
- Deploying a Mojolicious Application using Hypnotoad and Apache
nginx
- Getting started with Perl Dancer on Digital Ocean
no
- no
No-ops
- No-ops
no_plan
- Test without a Plan
nocontext
- Parse paragraphs with Regexp::Grammars
NoSQL
- Command line counter with Memcached
not
- Logical Operators in Perl - video
note
- Test diagnostic messages using diag, note, and explain
Notepad++
- Editors and IDEs for Perl developers - video
number
- String to number conversion - video
object
- Attribute types in Perl classes when using Moose
- Object Oriented Perl using Moose
object oriented
- Attribute types in Perl classes when using Moose
- Object Oriented Perl using Moose
Objects::ProhibitIndirectSyntax
- Converting indirect calls
- Eliminating indirect method calls
oct
- oct
OFS
- OFS
ok
- Getting started testing Perl module with Test2
- Moving over to Test::More
one-liners
- one-liner: read first elements of a huge directory
OOP
- Attribute types in Perl classes when using Moose
- Getting started with Classic Perl OOP
- OOP - Object Oriented Perl
- OOP with Moo
- Object Oriented Perl using Moose
- Using object oriented modules - video
- bless
open
- Always use 3-argument open
- Appending to files
- Command line counter with plain text file back-end
- Count the frequency of words in text using Perl
- Don't Open Files in the old way
- How to check if a string is all upper case (lower case) characters?
- How to improve my Perl program?
- How to merge one text file to the end of another text file?
- How to replace a string in a file with Perl
- How to split a text file line by line in Perl
- How to write to the beginning of a file?
- Old style open - video
- Open and read from text files
- Open file - video
- Open file all - video
- Open file to read and write in Perl, oh and lock it too
- Open file with error handling - video
- Open or die - video
- Read section of a file
- Reading and writing binary files in Perl
- Writing to files with Perl
- open
- open a file in Perl
- readline() on closed filehandle in Perl
- usage: GLOB->new([FILENAME [,MODE [,PERMS]]])
open or die
- Open and read from text files
- Short-circuit in boolean expressions
- Writing to files with Perl
open source
- Web sites powered by Perl with Open Source code-base
Open Source
- How to contribute to an Open Source Perl project
open source products
- Perl based open source products
opendir
- Data structure design for fast lookup
- Reading the content of a directory
- Traversing the filesystem - using a queue
- Understanding recursive subroutines - traversing a directory tree
- directory handle - video
- opendir
OpenOffice::OODoc
- How to join (merge) several ODT files into one document
openr_utf8
- use Path::Tiny to read and write file
operator expected
- Scalar found where operator expected
Operator Precedence and Associativity
- Operator Precedence and Associativity
OPTIONS
- Deleting item using Ajax request with DELETE and OPTIONS
or
- Logical Operators in Perl - video
- Short-circuit in boolean expressions
ord
- Solution: display unique rows of a file - video
- ord
- ord
our
- Package variables and Lexical variables in Perl
- Variable declaration in Perl
- our
- our
overload
- Stringification in classic Perl OOP
p
- Consider everything not recognizable as a paragraph in Markua
P5kkelabels
- New on CPAN - week ending on 2017-08-27
pack
- pack
package
- Constructor and accessors in classic Perl OOP
- Core Perl OOP: Constructor
- Global symbol requires explicit package name
- How to create a Perl Module for code reuse?
- How to install Perl modules on FreeBSD
- Namespaces and packages in Perl
- Package variables and Lexical variables in Perl
- Packages, modules, distributions, and namespaces in Perl
- package
Padre
- Editors and IDEs for Perl developers - video
- Perl Editor
- Welcome and Installation - video
PadWalker
- Installing PadWalker on Windows, Linux and Mac OSX
- PadWalker for Windows Solution
pairfirst
- Operations on value-pairs in Perl
pairgrep
- Operations on value-pairs in Perl
pairkeys
- Operations on value-pairs in Perl
pairmap
- Operations on value-pairs in Perl
pairs
- Operations on value-pairs in Perl
pairvalues
- Operations on value-pairs in Perl
PAR
- Tools to package Perl scripts, modules, and applications
PAR::Packer
- Tools to package Perl scripts, modules, and applications
paragraph
- Consider everything not recognizable as a paragraph in Markua
Parallel::ForkManager
- Random numbers in forked processes
- Speed up calculation by running in parallel
param
- Reverse Echo with Ajax and Dancer 2
parent
- OOP - Object Oriented Perl
parser
- Marpa for building parsers - a first look
parsing
- Help with perl (parsing error log)
path
- Checking the whois record of many domains
- Get CPANstats from MetaCPAN using cron
- How to add a relative directory to @INC
- Introducing the Perl Tidy GUI project
- Start writing the Markua parser in Perl
Path::Iterator::Rule
- Finding files in a directory tree using Perl
- How to rename multiple files with one command on Windows, Linux, or Mac?
- Indexing e-mails in an mbox
Path::Tiny
- Checking the whois record of many domains
- Command line counter with JSON backend
- Construct the path to a file in the same directory as the current script
- Get CPANstats from MetaCPAN using cron
- How to add a relative directory to @INC
- How to rename multiple files with one command on Windows, Linux, or Mac?
- How to replace a string in a file with Perl
- How to write to the beginning of a file?
- Increase numbers in a file
- Introducing the Perl Tidy GUI project
- Start writing the Markua parser in Perl
- slurp mode - reading a file in one step
- use Path::Tiny instead of home-made ReadFile and WriteFile
- use Path::Tiny to read and write file
Patreon
- Supporting Perl Creators via Patreon, GitHub, and more
Patro
- New on CPAN - week ending on 2017-08-27
PAUSED
- Fixing the release. Twice in a row! (Pod::Tree 1.22 and 1.23)
PDF::Create
- Adding images to PDF using Perl
Perl
- $_ the default variable of Perl
- Books
- Common causes and fixes for HTTP 500 Error in Perl CGI scripts
- Compare the speed of Perl and Python regexes
- Evaluate Perl project for new client - assessment
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Introducing CPANCover - Showing Test coverage reports of Perl modules
- Minimal requirements for a blog
- Perl One-liner: countdown on the command line:
- Perl Tk text widget to be used as a console
- Scalar and List context in Perl, the size of an array
- Sponsoring FErki
- Supporting Perl Creators via Patreon, GitHub, and more
- Which Version of Perl are you using?
perl
- One-liner: Remove first two characters of every line
Perl 5
- How to add the license field to the META.yml and META.json files on CPAN?
- How to convince Meta CPAN to show a link to the version control system of a distribution?
Perl Classes
- Perl Classes
Perl Modules
- Perl Modules
perl-version
- Bumping version numbers in all the modules at once
PERL5LIB
- Changing @INC - video
- How to change @INC to find Perl modules in non-standard locations
Perl::Critic
- 1: Jeffrey Thalhammer, author of Perl::Critic and Pinto
- Always require explicit importing of functions
- Avoid (unwanted) bitwise operators
- Bare Here documents are deprecated - How to find offending code?
- Converting indirect calls
- Fix Perl::Critic test failures reported by CPAN Testers
- Getting Started with Perl::Critic (the linter for Perl)
- How to forbid certain Perl modules from use?
- How to improve my Perl program?
- How to return nothing (or undef) from a function in Perl?
- Improving your Perl code - one Perl::Critic policy at a time
- Move packages to their own files - release Pod::Tree 1.21
- Perl Critic distributions and policies
- Perl Critic reports
- Perl::Critic exclude some policies - fix others (Pod::Tree 1.24)
- Private Member Data shouldn't be accessed directly - encapsulation violation
- Set minimum version number in every Perl file
- Three-argument form of open used and it is not available until perl 5.6.
- Type checking with Moo
Perl::critic
- Perl::Critic example - lint for Perl
Perl::Critic::Bangs
- Avoid (unwanted) bitwise operators
Perl::Critic::Policy
- Finding all Plack Middleware or Perl::Critic Policies
Perl::Tidy
- App PerlTidy Tk version 0.01
- How to improve my Perl program?
- Introducing the Perl Tidy GUI project
- Run Perl::Tidy to beautify the code
- Use Perl::Tidy module in your application
Perl::Tk
- App PerlTidy Tk version 0.01
Perl::Version
- Bumping version numbers in all the modules at once
- How to compare version numbers in Perl and for CPAN modules
- Perl::Version vs version confusion
PERL_USE_UNSAFE_INC
- Removal of the current directory (".") from @INC in Perl 5.26 and Travis-CI
perlbrew
- Perlbrew on Linux (Ubuntu 18.10)
- Upgrading perl on Linux or OSX - installing perl using perlbrew without being root
perlcritic
- Avoid (unwanted) bitwise operators
- Bare Here documents are deprecated - How to find offending code?
- Eliminating indirect method calls
- Getting Started with Perl::Critic (the linter for Perl)
- Improving your Perl code - one Perl::Critic policy at a time
- Move packages to their own files - release Pod::Tree 1.21
- Perl::Critic example - lint for Perl
perldoc
- Core Perl documentation and CPAN module documentation
- Documentation of Perl - video
- Modules - Behind the scenes
- POD - Plain Old Documentation
- Solution: Hello World part 2 (what is the difference between comment and POD?) - video
PERLLIB
- How to change @INC to find Perl modules in non-standard locations
PerlMaven
- Contributions to Open Source projects
- Convert Markdown to HTML
- DWIM Perl
- Github Actions for Perl running on Windows, Mac OSX, and Ubuntu Linux
- Perl Tk
- substr
perltidy
- App PerlTidy Tk version 0.01
- Introducing the Perl Tidy GUI project
PerlWeekly
- Perl modules on CPAN having links to VCS and having CI configured
PHP
- Using the exiftool library from php (in place of native php function)
ping
- How to check if a server is live using Ping?
Pinto
- 1: Jeffrey Thalhammer, author of Perl::Critic and Pinto
pinto
- Pinto -- A Custom CPAN In A Box
pipe
- pipe
Pipelines
- Bitbucket Pipelines (the CI system) for Perl projects
pkg
- How to install Perl modules on FreeBSD
Plack
- Getting started with PSGI
- How to build a dynamic web application using PSGI
- Moving from CGI to PSGI and Starman
- PSGI the superglue between Perl web application frameworks and web servers
- Which is better perl-CGI, mod_perl or PSGI?
Plack::App::CGIBin
- Running CGI script as a Plack application with Plack::App::CGIBin
Plack::App::File
- Serving a static site (the content of a directory) using Plack and PSGI
Plack::Builder
- Serving a static site (the content of a directory) using Plack and PSGI
- Serving static files such as favicon.ico and robots.txt using Plack
Plack::Handler::CGI
- Echo with Plack in CGI mode
- Hello World with Plack in CGI mode
Plack::Middleware
- Finding all Plack Middleware or Perl::Critic Policies
Plack::Middleware::DirIndex
- Serving a static site (the content of a directory) using Plack and PSGI
- Testing PSGI based web applications using Plack::Test
Plack::Middleware::Static
- Serving static files such as favicon.ico and robots.txt using Plack
Plack::Request
- Asynchronous web application with PSGI and Twiggy
- Create skeleton PSGI application for the SCO project
Plack::Test
- Testing PSGI based web applications using Plack::Test
plackup
- Concurrent Requests and measuring performance with ApacheBench
- Dancer2: Hello World
- Dancer2: Plackup reload on Windows and Linux
- Getting started with PSGI
- Hello World with Dancer2
- Hello World with Perl Dancer
- How to build a dynamic web application using PSGI
- Running CGI script as a Plack application with Plack::App::CGIBin
- Serving a static site (the content of a directory) using Plack and PSGI
POD
- Core Perl documentation and CPAN module documentation
- POD - Plain Old Documentation
- POD - Plain Old Documentation - video
- POD - modules processing Plain Old Documentation format
pod2html
- POD - Plain Old Documentation
- Solution: Hello World part 2 (what is the difference between comment and POD?) - video
pod2pdf
- POD - Plain Old Documentation
Pod::Tree
- Becoming a co-maintainer of a CPAN-module
- Becoming a co-maintainer of a CPAN-module - the first steps (Pod::Tree 1.17_01, 1.18)
Pod::Usage
- Sending email with attachments - video
pop
- Manipulating Perl arrays: shift, unshift, push, pop
- Perl Arrays
- Reverse Polish Calculator in Perl using a stack
- pop
- pop and push - video
pos
- pos
POSIX
- How to check if a child process is still running in Perl?
- Simple timestamp generation using POSIX strftime in Perl
PosixDigit
- Regex matching digits
PosixXDigit
- Regex matching digits
possible typo
- Name "main::x" used only once: possible typo at ...
POST
- Add and retrieve elements - jQuery + Ajax
- Add and retrieve items - MongoDB, Dancer and Testing!
- Dancer 1 echo using POST and testing POST
- Dancer2: Process GET and POST requests
- Send data to Elasticsearch using Perl LWP::UserAgent
PostgreSQL
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
PPI
- Refactoring Perl code
ppm
- Installing Perl modules from the OS vendor - video
predicate
- Moo attribute predicate and clearer
pretty
- Generate test expectations for the Markua parser
Prima
- GUI with Perl for desktop applications
PRIMARY KEY
- Process status in SQLite
print
- Debugging Perl scripts
- Installing and getting started with Perl
- Write to file - video
- Your first script: Hello world - video
- print
printf
- Don't interpolate in printf (Missing argument in sprintf at ...)
- Formatted printing in Perl using printf and sprintf
product
- min, max, sum in Perl using List::Util
prompt
- Prompt for user input using IO::Prompter
prototype
- prototype
prove
- Dancer 1 test Hello World
- Getting started testing Perl module with Test2
- How to run the tests of a typical Perl module
- Process the 6 headers of Markua
- Refactor test cases of the Markua Parser in Perl 5
- prove, the harness
PSGI
- Asynchronous web application with PSGI and Twiggy
- Combining SVG and PSGI
- Concurrent Requests and measuring performance with ApacheBench
- Create skeleton PSGI application for the SCO project
- Getting started with PSGI
- How to build a dynamic web application using PSGI
- Modern Web with Perl
- Moving from CGI to PSGI and Starman
- PSGI and AJAX for single-page applications
- PSGI the superglue between Perl web application frameworks and web servers
- Routing with PSGI
- Start using Template Toolkit to show the empty pages
- Which is better perl-CGI, mod_perl or PSGI?
push
- Exchange values and keys of a hash - how to reverse a hash
- Manipulating Perl arrays: shift, unshift, push, pop
- Perl Arrays
- Reverse Polish Calculator in Perl using a stack
- Using a queue in Perl
- pop and push - video
pwd
- Current working directory in Perl (cwd, pwd)
- How to change directory (chdir, cd) in Perl?
- More UNIX commands - video
Python
- Compare the speed of Perl and Python regexes
q
- Here documents, or how to create multi-line strings in Perl
- Strings in Perl: quoted, interpolated and escaped
- q
- q
qq
- Here documents, or how to create multi-line strings in Perl
- Strings in Perl: quoted, interpolated and escaped
- qq
- qq
qr
- Check several regexes on many strings
- Escaping \ in regex: Unmatched ( in regex; marked by <-- HERE
- qr
quantifiers
- Quantifiers - video
QUERY_STRING
- Echo with plain CGI
queue
- Traversing the filesystem - using a queue
- Using a queue in Perl
quote
- Strings in Perl: quoted, interpolated and escaped
Quote and Quote-like Operators
- Quote and Quote-like Operators
Quote-Like Operators
- Quote-Like Operators
quotemeta
- quotemeta
qw
- Array assignment - video
- qw - quote word
qx
- How to provide STDIN to an external executable?
- qx or backticks - running external command and capturing the output
rand
- Generate random numbers in Perl with the rand() function
- Number Guessing game
- Random numbers in forked processes
- Select random elements from a weighted list
- rand() and int() - video
random
- Have exceeded the maximum number of attempts (1000) to open temp file/dir
- Number Guessing game
Range Operators
- Range Operators
raw
- Reading and writing binary files in Perl
re
- Compare the speed of Perl and Python regexes
- Keep data in client and fetch only changes
- Testing a tree data structure in Perl
- Use of uninitialized value $got in pattern match (m//) at Test/Deep/Regexp.pm line 57.
read
- Open and read from text files
- Read section of a file
- read
- tell how far have we read a file
read_file
- How to replace a string in a file with Perl
read_password
- How to read a password on the command line?
readdir
- Reading the content of a directory
- Traversing the filesystem - using a queue
- Understanding recursive subroutines - traversing a directory tree
- directory handle - video
- readdir
ReadLine
- History in the Perl debugger, make the up arrow work
readline
- Read file line by line - video
- read one line - video
- readline
readlink
- Get real path (absolute path) from symbolic link (aka. softlink)
- readlink
README
- Changes and README files in a Perl distribution
Readonly
- Constants and read-only variables in Perl
Readonly::XS
- Constants and read-only variables in Perl
readpipe
- readpipe
recursion
- Recursion in Perl
recursive
- Deep recursion on subroutine
- Finding files in a directory tree using Perl
- Understanding recursive subroutines - traversing a directory tree
recv
- recv
Redis
- Counter using Dancer2 and Redis in a Docker container
redo
- redo
reduce
- Fast lookup by name or by date - Array - Hash - Linked List
- How to calculate factorial in Perl - n!
ref
- Stringification in classic Perl OOP
- Use the same sub as function or as method in Perl
- ref
- ref - What kind of reference is this variable?
REF
- ref - What kind of reference is this variable?
refactoring
- Refactoring code snippet
regex
- Always check if the regex was successful
- Check several regexes on many strings
- Email validation using Regular Expression in Perl
- How to extract strings from a file
- How to grep a file using Perl
- Partially hide data fields
- Process the 6 headers of Markua
- Regex - Regular Expressions in Perl 5
- Regex Problem splitting verilog Bit-Blasted pathes
- Understanding Regular Expressions found in Getopt::Std
- Understanding dates using regular expressions
- Understanding regular expressions
regexes
- /x modifier for verbose regexes - video
- Any number of any characters - video
- Case insensitive regexes - video
- Character classes - video
- Exercise: Match numbers with regex - video
- Exercise: Roman numbers - video
- Exercise: hexa, octal, binary - video
- Exercise: parse INI file - video
- Exercise: parse hours log file and create time report - video
- Exercise: parse perl file - video
- Exercise: sort SNMP numbers - video
- Exercise: split HTTP GET request - video
- Exercise: split path - filename/dirname - video
- Finding a string in a file - video
- Fixing Assembly with Perl - video
- Fixing dates using Regexes - video
- Global substitution with regexes - video
- Greedy regex quantifiers - video
- Match any character - video
- Minimal Regex Matching - video
- More about Character classes - video
- Negated character class - video
- Optional Characters - video
- Quantifiers on Character classes - video
- Regex Alternatives - video
- Regex Anchors - video
- Regexes - video
- Simple use of Regexes - video
- Single character match - video
- Single-line regexes using /s - video
- Solution: Match numbers with regex - video
- Solution: hexa, octal, binary - video
- Solution: regexes 2 - video
- Solution: regexes 3 - video
- Solution: sort SNMP numbers - video
- Solution: split HTTP using Regex - video
- Solution: split path - filename/dirname - video
- Special character classes - video
- Were can I use Regexes - video
- m-for-matching - video
- multiple lines in regexes - video
- split with regex - video
- substitution - video
- trim - video
Regexp
- ref - What kind of reference is this variable?
Regexp Quote-Like Operators
- Regexp Quote-Like Operators
Regexp::Grammars
- Parse paragraphs with Regexp::Grammars
- Regexp::Grammars parse text with markup or markdown
regular expression
- Understanding dates using regular expressions
rel2abs
- Changing @INC relative path - video
Relational Operators
- Relational Operators
remove
- Deleting item using Ajax request with DELETE and OPTIONS
- How to remove, copy or rename a file with Perl
rename
- How to remove, copy or rename a file with Perl
- Unix and DOS commands - video
- rename
- rename files - video
REPL
- Using the built-in debugger of Perl as REPL
replace
- How to replace a string in a file with Perl
require
- How does require find the module to be loaded?
- Modules in Perl
- Perl 4 libraries
- What is @INC in Perl?
- What is the difference between require and use in Perl? What does import do?
- require
required
- Moo and required attributes
reset
- reset
return
- How to return nothing (or undef) from a function in Perl?
- Returning multiple values or a list from a subroutine in Perl
- Subroutines and functions in Perl
- The curious case of implicit return
- Understanding recursive subroutines - traversing a directory tree
- return
reverse
- Exchange values and keys of a hash - how to reverse a hash
- How to print elements of an array in reverse order in Perl
- Reverse an array, a string or a number
- reverse - video
rewinddir
- rewinddir
Rex
- Benchmark: Refactoring MD5 calculation in Rex
- Levels of security using (R)?ex
- Moving from CGI to PSGI and Starman
- Rex
- Sponsoring FErki
Riji
- Blogging with Riji
rindex
- How to break lines with max width? (wrap)
- rindex
rlib
- How to add a relative directory to @INC
rm
- How to remove, copy or rename a file with Perl
rm -rf
- Remove directory tree recursively with Perl
rmdir
- Unix and DOS commands - video
- rmdir
rmtree
- More UNIX commands - video
- Remove directory tree recursively with Perl
robots.txt
- Serving static files such as favicon.ico and robots.txt using Plack
Rocks
- CPAN Digger - CPAN Dashboard - CPAN Rocks
RT
- CPAN Digger explained
- MetaCPAN URLs and Issues
- RT.CPAN.ORG is closing
rtrim
- trim - removing leading and trailing white spaces with Perl
rule
- Parse paragraphs with Regexp::Grammars
RUN
- RUN
run
- How to provide STDIN to an external executable?
run3
- How to provide STDIN to an external executable?
rw
- Moose constructor
- Moose testing type constraint
s
- Single-line regexes using /s - video
s/
- substitution - video
s///
- s///
salt
- Storing Password in an easy and secure way using Perl
say
- Installing and getting started with Perl
- Scalar variables
- What's new in Perl 5.10? say, //, state
scalar
- $_ the default variable of Perl
- Installing and getting started with Perl
- Length of an array in Perl
- Perl Arrays
- Reading from a file in scalar and list context
- STDIN in scalar and list context
- Scalar and List context in Perl, the size of an array
- String functions: length, lc, uc, index, substr
- scalar
SCALAR
- Conext sensitivity - video
- array in context - video
- ref - What kind of reference is this variable?
scalar found
- Scalar found where operator expected
Scalar value constructors
- Scalar value constructors
Scalar values
- Scalar values
Scalar::Util
- Automatic string to number conversion or casting in Perl
- Class as type constraint
- Class method and alternative constructor in classic Perl OOP
- Eliminate circular reference memory-leak using weaken
- Looks like number - video
- Stringification in classic Perl OOP
- Type checking with Moo
Schwartzian
- How to sort faster in Perl? (using the Schwartzian transform)
SCO
- Add "404 Not Found" page
- Add another static page
- Add some acceptance tests using search.cpan.org
- Create the search.cpan.org look and feel
- Getting started - Create skeleton for the SCO clone application
- List authors where the PAUSEID starts with a given letter
- Protecting from crash
- Rename the SCO cloning project
- Show CPANstats on every page
- search.cpan.org: Authors, Recent, FAQ, Feedback
- search.cpan.org: Individual Author pages
scope
- "my" variable masks earlier declaration in same scope
- Scope of variables in Perl
screencast
- /x modifier for verbose regexes - video
- A hash and its uses - video
- A test file in Perl
- Accessor with type constraint
- Add "404 Not Found" page
- Add FAQ entry to MetaCPAN
- Add GitHub Actions (CI) to Graphics-Toolkit-Color Perl module
- Add another static page
- Add some acceptance tests using search.cpan.org
- Adding GitHub Actions to Test2::Harness::UI
- Analyze Apache log file - video
- Any number of any characters - video
- App PerlTidy Tk version 0.01
- Array assignment - video
- Array indexes (screencast) - video
- Array indexes - video
- Build.PL of Module::Build
- Building a blog engine using Perl Dancer
- Building an open source clone of search.cpan.org using the MetaCPAN API
- CPAN Dashboard
- CPAN Digger - CPAN Dashboard - CPAN Rocks
- CPAN Digger and the Hacktoberfest
- CPAN Testers and CPAN Ratings - video
- CPAN, mcpan, MetaCPAN
- Case insensitive regexes - video
- Changes and README files in a Perl distribution
- Changing @INC - video
- Changing @INC relative path - video
- Character classes - video
- Check several regexes on many strings
- Class as type constraint
- Classes as constraints in Moose
- Command line parameters (screencast) - video
- Command line parameters - video
- Comments - video
- Common Errors and Warnings - video
- Compare Values - video
- Comparing complex data-structures using is_deeply
- Comparing scalars in Perl
- Comparing the speed of JSON decoders
- Comparison Operators - video
- Conext sensitivity - video
- Contributing to a Perl module on CPAN (using vim and GitHub)
- Contributions to Open Source projects
- Core Perl OOP: Constructor
- Core Perl OOP: Constructor arguments
- Core Perl OOP: attributes, getter - setter
- Count digits - video
- Counting words in a file - video
- Course Management Application in Mojolicious - part 1
- Course Management Application in Mojolicious - part 2
- Course Management Application in Mojolicious - part 3
- Course Management Application in Mojolicious - part 4
- Course Management Application in Mojolicious - part 5
- Course Management Application in Mojolicious - part 6
- Course Management Application in Mojolicious - part 7
- Create Linux user account - video
- Create skeleton PSGI application for the SCO project
- Create the search.cpan.org look and feel
- Creating a Perl binding to a C library using FFI with Sawyer X
- Creating a hash - video
- Creating a hash from an array - video
- Creating a testing module
- Creating an array - video
- Creating subtypes for Moose
- Dancer2: Before and After Hooks
- Dancer2: Configuration
- Dancer2: Exercise 1 - Calculator, Counter
- Dancer2: Exercise 2 - Multi-Counter, Random redirection
- Dancer2: Exercise 3 - Simple Single-user TODO list AP
- Dancer2: Hello World
- Dancer2: Hello World with Visual Studio Code
- Dancer2: Install Perl on Linux and Mac OSX
- Dancer2: Install Perl, editor, Dancer2
- Dancer2: Logging
- Dancer2: More route parameters
- Dancer2: Plackup reload on Windows and Linux
- Dancer2: Process GET and POST requests
- Dancer2: Return JSON
- Dancer2: Route parameters and sending 404 manually
- Dancer2: Sessions
- Dancer2: Show current time
- Dancer2: Show errors during development
- Dancer2: Skeleton
- Dancer2: Solution 2 - Random redirect
- Dancer2: Solution 2 - Route-based Multi-Counter
- Dancer2: Solution 3 - Simple Single-user TODO list AP
- Dancer2: Solution: 1 - Calculator
- Dancer2: Solution: 1 - Calculator fixing
- Dancer2: Solution: 1 - Counter
- Dancer2: Template Tiny
- Dancer2: Template Toolkit
- Dancer2: Testing 404 and 500 error responses
- Dancer2: Testing Hello World
- Dancer2: Upload file
- Debug sum numbers - video
- Debugging Perl scripts - video
- Defining subroutines - video
- Diskspace usage: df in Perl - video
- Distribution directory layout
- Documentation of Perl - video
- Don't interpolate in printf (Missing argument in sprintf at ...)
- Dumping a hash - video
- Editors and IDEs for Perl developers - video
- Enable GitHub Actions for CI on Math::Polynomial::Chebyshev
- Exercise: Hello World - video
- Exercise: Match numbers with regex - video
- Exercise: Roman numbers - video
- Exercise: hexa, octal, binary - video
- Exercise: improve Apache log analyzer - video
- Exercise: improve color selector - video
- Exercise: parse HTTP values - video
- Exercise: parse INI file - video
- Exercise: parse hours log file and create time report - video
- Exercise: parse perl file - video
- Exercise: parse variable width fields - video
- Exercise: sort SNMP numbers - video
- Exercise: sort scores - video
- Exercise: split HTTP GET request - video
- Exercise: split path - filename/dirname - video
- Exploring BDD in Perl - using Test::BDD::Cucumber
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 1
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 2
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 3
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 4
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 5 - with Erik Hülsmann
- Exporting and importing functions easily
- Fetching data from YouTube using Perl
- Fetching data from a hash - video
- File globbing - video
- File::Find - video
- File::HomeDir - video
- File::Spec - video
- Filehandle in SCALAR and LIST context - video
- Finding a string in a file - video
- Fix the documentation of the MetaCPAN::Client
- Fixing Assembly with Perl - video
- Fixing dates using Regexes - video
- Forget your plan, just call done_testing
- Functions and Subroutines - video
- Get CPANstats from MetaCPAN using cron
- Getting started - Create skeleton for the SCO clone application
- Getting started with Perl Dancer - Creating an Echo application
- Getting started with Perl on Windows using Strawberry Perl (2020 edition)
- GitHub Actions CI job for Perl Test::Class - checking downstream dependencies as well
- Global substitution with regexes - video
- Greedy regex quantifiers - video
- Hello World with Mojolicious in Docker
- Here documents - video
- Home-made coercion
- How does require find the module to be loaded?
- How to break lines with max width? (wrap)
- Implementing 'is_any' to test multiple expected values
- Import on demand
- Installing Perl modules from the OS vendor - video
- Installing Perl modules using cpan - video
- Installing and getting started with Perl
- Introducing test automation with Test::Simple
- Introducing the Perl Tidy GUI project
- Introduction to the Advanced Perl course
- Is this IP in the given subnet?
- Join - video
- List assignment - video
- List::GroupBy
- Lists in Perl - video
- Logging in modules with Log4perl the easy way
- Logging with Log4perl the easy way
- Logical Operators in Perl - video
- Looking at a specific commit in GitHub
- Looks like number - video
- Loop controls: next last - video
- MANIFEST and MANIFEST.SKIP
- Makefile.PL of ExtUtils::MakeMaker
- Makefile.PL of Module::Install
- Match any character - video
- MetaCPAN Task::Kensho - recommended Perl modules
- MetaCPAN URLs and Issues
- MetaCPAN and the CPAN Testers
- MetaCPAN is awesome!
- MetaCPAN recent uploads
- Minimal Regex Matching - video
- Mocking function to fake environment
- Modern Web with Perl
- Modules - Behind the scenes
- Modules in Perl
- Moose constructor
- Moose testing type constraint
- Moose type constraints
- Moose: Testing the constructor
- Moose: coerce value to a subtype
- Moose: testing the setter and getter
- More UNIX commands - video
- More about Character classes - video
- Moving over to Test::More
- Multiple expected values - testing dice
- Namespaces and packages in Perl
- Negated character class - video
- No such file - video
- Numerical Operators - video
- OOP with Moo
- Old style open - video
- One-liner sum of column in CSV - video
- Open file - video
- Open file all - video
- Open file with error handling - video
- Open or die - video
- Optional Characters - video
- Organizing a test script with subtests
- POD - Plain Old Documentation - video
- Packaging a Perl script and a Perl module
- Packaging with Build.PL
- Packaging with Makefile.PL
- Perl 4 libraries
- Perl Tk text widget to be used as a console
- Perl Tk: Keyboard and Mouse events
- Perl Tk: The label, button, and entry widgets
- Perl Tk: The label, button, and entry widgets
- Perl modules on CPAN having links to VCS and having CI configured
- Perl on the command line (screencast) - video
- Perl videos and screencasts
- Process CSV file - video
- Process CSV file short version - video
- Process CSV file using Text::CSV_XS - video
- Process command line using Getopt::Long (screencast) - video
- Process command line using Getopt::Long - video
- Processing config file - video
- Protecting from crash
- Quantifiers - video
- Quantifiers on Character classes - video
- RT.CPAN.ORG is closing
- Read file line by line - video
- Read fixed width records - using unpack - video
- Read section of a file
- Reading Excel file using Perl - video
- Refactoring large test suite - separating data from code
- Regex Alternatives - video
- Regex Anchors - video
- Regex Capturing - video
- Regexes - video
- Rename the SCO cloning project
- Reporting diskspace usage on a mail server - video
- Restrict the import by listing the functions to be imported
- Running CGI script as a Plack application with Plack::App::CGIBin
- Safety net (use strict; use warnings;) - video
- Scalar values and variables - video
- Scalar variables
- Scope of Variables - video
- Sending HTML e-mail using Email::Stuffer
- Sending email with attachments - video
- Separate release branch for App::Puppet::Environment::Updater
- Separating test data from test code
- Serving static files such as favicon.ico and robots.txt using Plack
- Short Circuit - video
- Show CPANstats on every page
- Show error logs on Github Actions - Install developer dependencies first (Test::CSS)
- Simple use of Regexes - video
- Single character match - video
- Single-line regexes using /s - video
- Solution: Hello World part 1 - video
- Solution: Hello World part 2 (what is the difference between comment and POD?) - video
- Solution: Match numbers with regex - video
- Solution: add more statistics - video
- Solution: area of rectangular - video
- Solution: area prompt and warn - video
- Solution: concatenation - video
- Solution: hexa, octal, binary - video
- Solution: improve Apache log-analyzer - video
- Solution: improve color selector - video
- Solution: improve the color selector - check input - video
- Solution: improve the color selector - colors.txt - video
- Solution: improve the color selector - filename - video
- Solution: improve the color selector - force - video
- Solution: improve the color selector - video
- Solution: number guessing game - d debug toggle - video
- Solution: number guessing game - exit - video
- Solution: number guessing game - m move toggle - video
- Solution: number guessing game - multiple guesses - video
- Solution: number guessing game - n next game - video
- Solution: number guessing game - s show - video
- Solution: number guessing game - video
- Solution: parse HTTP values - video
- Solution: parse variable width fields - video
- Solution: regexes 1 - video
- Solution: regexes 2 - video
- Solution: regexes 3 - video
- Solution: sort SNMP numbers - video
- Solution: sort scores - video
- Solution: split HTTP using Regex - video
- Solution: split path - filename/dirname - video
- Solution: write report to file - video
- Some interesting CPAN modules - video
- Special character classes - video
- Sponsoring FErki
- Start using Template Toolkit to show the empty pages
- Start using the MetaCPAN API Client to fetch the list of most recently uploaded Perl modules
- String functions: index - video
- String functions: length, lc, uc, index, substr
- String operators - video
- String to number conversion - video
- Substr - video
- Sum numbers in a file - video
- TODO - testing a bug or a future feature
- Test diagnostic messages using diag, note, and explain
- Test for expected warnings
- Test plan and test descriptions
- Test without a Plan
- Test::Builder object
- Testing sessions by mocking time
- Testing timeout with cmp_ok
- The 'if' statement - video
- The Ternary operator - video
- The problem with Perl 4 style libraries
- The value of a clean Continuous Integration (CI) system (for Data-Trace)
- The year of 19100 - video
- Tools to package Perl scripts, modules, and applications
- True False - video
- Type constraint instead of subtype
- Unix and DOS commands - video
- Using 'like' to test without exact values
- Using GitHub Actions (CI) to locate missing test dependencies in Dist::Zilla::PERLSRVDE
- Using object oriented modules - video
- Using procedural Perl modules - video
- Using the built-in debugger of Perl
- Using the built-in debugger of Perl as REPL
- Variable interpolation - User Input and Output - chomp - video
- Welcome and Installation - video
- Were can I use Regexes - video
- What is CI and why is it good for you?
- What is CPAN? - video
- What is the difference between require and use in Perl? What does import do?
- What is the status of the current test script?
- What return is expected from a function?
- Write to file - video
- Your first script: Hello world - video
- array in context - video
- die, warn, exit - video
- directory handle - video
- disk usage: du in Perl - video
- exists, delete in hash - video
- external-programs - video
- foreach loop over list - video
- hash in SCALAR context - video
- m-for-matching - video
- multiple lines in regexes - video
- pop and push - video
- prove, the harness
- rand() and int() - video
- read one line - video
- rename files - video
- reverse - video
- search.cpan.org - video
- search.cpan.org: Authors, Recent, FAQ, Feedback
- search.cpan.org: Individual Author pages
- shell-x - video
- shift - video
- shift and unshift - video
- slurp - video
- sort - video
- split with regex - video
- strings in double quotes - video
- strings in single quotes - video
- substitution - video
- trim - video
- undef - video
- wantarray - returning list or scalar based on context
- while loop - video
security
- How to read a password on the command line?
seek
- Open file to read and write in Perl, oh and lock it too
- Read section of a file
- seek - move the position in the filehandle in Perl
SEEK_CUR
- seek - move the position in the filehandle in Perl
SEEK_END
- Open file to read and write in Perl, oh and lock it too
- seek - move the position in the filehandle in Perl
SEEK_SET
- Read section of a file
- seek - move the position in the filehandle in Perl
seekdir
- seekdir
select
- select
SELECT
- Simple Database access using Perl DBI and SQL
selectrow_array
- Process status in SQLite
semctl
- semctl
semget
- semget
semop
- semop
send
- send
separator
- Perl Tk: The label, button, and entry widgets
Sereal
- Data Serialization in Perl
session
- Counter with Dancer Sessions
- Dancer2: Sessions
Session
- Dancer Simple Session and testing a session
Set::Scalar
- Sets in Perl using Set::Scalar
setgrent
- setgrent
sethostent
- sethostent
setnetent
- setnetent
setpgrp
- setpgrp
setpriority
- setpriority
setprotoent
- setprotoent
setpwent
- setpwent
sets
- Sets in Perl using Set::Scalar
setservent
- setservent
setsockopt
- setsockopt
setter
- Attribute types in Perl classes when using Moose
- Core Perl OOP: attributes, getter - setter
- Object Oriented Perl using Moose
- What should setters return? (Examples with core Perl OOP)
shell
- Unix and DOS commands - video
- external-programs - video
- shell-x - video
shift
- Manipulating Perl arrays: shift, unshift, push, pop
- Perl Arrays
- Processing command line arguments - @ARGV in Perl
- Using a queue in Perl
- shift
- shift - video
- shift and unshift - video
- shift in Perl
Shift Operators
- Shift Operators
shmctl
- shmctl
shmget
- shmget
shmread
- shmread
shmwrite
- shmwrite
shutdown
- shutdown
sigil
- Scalar variables
sin
- sin
sites
- How to get Help for Perl?
- The 11 Most useful Perl sites
size
- Perl Arrays
- Scalar and List context in Perl, the size of an array
Skype::Any
- How to get notification when specific contact goes online in Skype?
sleep
- sleep
Slices
- Slices
slurp
- How to replace a string in a file with Perl
- Introducing the Perl Tidy GUI project
- slurp - video
- slurp mode - reading a file in one step
- use Path::Tiny instead of home-made ReadFile and WriteFile
slurp_utf8
- Increase numbers in a file
- use Path::Tiny to read and write file
smart match
- Smart Matching in Perl 5.10
Smartmatch Operator
- Smartmatch Operator
Smartmatching of Objects
- Smartmatching of Objects
Smolder
- TAP - Test Anything Protocol
SNMP
- Exercise: sort SNMP numbers - video
SOAP::WSDL
- "Deep recursion" warning while using wsdl2perl.pl
- Modify default timeout in SOAP::WSDL
- New to SOAP::WSDL
- SOAP::WSDL retrieving output
- import schema within the WSDL
socket
- socket
socketpair
- socketpair
Solution
- Solution: Hello World part 1 - video
solution
- Solution: add more statistics - video
- Solution: area of rectangular - video
- Solution: area prompt and warn - video
- Solution: improve the color selector - check input - video
- Solution: improve the color selector - colors.txt - video
- Solution: improve the color selector - filename - video
- Solution: improve the color selector - force - video
- Solution: improve the color selector - video
- Solution: number guessing game - d debug toggle - video
- Solution: number guessing game - exit - video
- Solution: number guessing game - m move toggle - video
- Solution: number guessing game - multiple guesses - video
- Solution: number guessing game - n next game - video
- Solution: number guessing game - s show - video
- Solution: number guessing game - video
- Solution: write report to file - video
sort
- Binary search in Perl array
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- How to sort faster in Perl? (using the Schwartzian transform)
- Short-circuit in boolean expressions
- Sorting arrays in Perl
- Sorting mixed strings
- The easiest way to find the highest hash value without looping through all of them (max)
- sort
- sort - video
sort_by
- Generate test expectations for the Markua parser
source
- How to change directory (chdir, cd) in Perl?
space
- How to check if string is empty or has only spaces in it using Perl?
Special Literals
- Special Literals
spew
- use Path::Tiny instead of home-made ReadFile and WriteFile
spew_utf8
- Get CPANstats from MetaCPAN using cron
- use Path::Tiny to read and write file
splain
- use diagnostic; or use splain
splice
- Fast lookup by name or by date - Array - Hash - Linked List
- How to eliminate a value in the middle of an array in Perl?
- How to insert an array into another array in Perl?
- How to splice a CSV file in Perl (filter columns of CSV file)
- Splice to slice and dice arrays in Perl
- splice
split
- Count the frequency of words in text using Perl
- How to calculate the balance of bank accounts in a CSV file, using Perl?
- How to read a CSV file using Perl?
- How to replace a column in a CSV file using Perl
- How to split a text file line by line in Perl
- Increase numbers in a file
- Multiple command line counters with plain TSV text file back-end
- Perl split - to cut up a string into pieces
- Split retaining the separator or parts of it in Perl
- Split up and flatten CSV file
- Use of implicit split to @_ is deprecated ...
- Why does this code not work? (split, array slice)
- Why does this code not work? (split, array slice) - Solution
- split
- split with regex - video
sponsorship
- Supporting Perl Creators via Patreon, GitHub, and more
Spreadsheet::ParseExcel::Simple
- Reading Excel file using Perl - video
Spreadsheet::Read
- How to read an Excel file in Perl
Spreadsheet::WriteExcel
- Spreadsheet::WriteExcel - Maximum number of sheets
sprintf
- Don't interpolate in printf (Missing argument in sprintf at ...)
- Formatted printing in Perl using printf and sprintf
SQL
- Calculating bank balance, take two: DBD::CSV
- Simple Database access using Perl DBI and SQL
SQL::Translator
- A command line counter with database back-end using DBIx::Class
SQLite
- Counter with Dancer using in-memory SQLite database
- SQLite in Memory
- Simple Database access using Perl DBI and SQL
sqrt
- sqrt
srand
- Random numbers in forked processes
ssh
- Levels of security using (R)?ex
Starman
- Concurrent Requests and measuring performance with ApacheBench
- Getting started with Perl Dancer on Digital Ocean
- Moving from CGI to PSGI and Starman
START
- START
stat
- File modify date - When was a file last changed?
- How to get the size of a file in Perl
- stat
state
- Detect recursion using state variables
- How to capture and save warnings in Perl
- Package variables and Lexical variables in Perl
- Static and state variables in Perl
- Variable declaration in Perl
- What's new in Perl 5.10? say, //, state
- state
static
- Static and state variables in Perl
Statsd
- Statsd with Perl
STDERR
- Capture STDOUT and STDERR of external program using Capture::Tiny
- Standard output, standard error and command line redirection
- Warning when something goes wrong
STDIN
- CLI - Command Line Interface in Perl
- How to read a password on the command line?
- Installing and getting started with Perl
- Open and read from text files
- Prompt for user input using IO::Prompter
- Prompt, read from STDIN, read from the keyboard in Perl
- STDIN in scalar and list context
STDOUT
- Capture STDOUT and STDERR of external program using Capture::Tiny
- How to create an Indian Rupee symbol with Perl code
- Standard output, standard error and command line redirection
Storable
- Caching data using the Cache module
- Data Serialization in Perl
Strawberry Perl
- Getting started with Perl on Windows using Strawberry Perl (2020 edition)
- Installing a Perl Module from CPAN on Windows, Linux and Mac OSX
strftime
- Simple timestamp generation using POSIX strftime in Perl
strict
- Always use strict and use warnings in your perl code!
- Always use strict!
- Barewords in Perl
- Creating subroutines on the fly using Symbolic references
- Global symbol requires explicit package name
- Installing and getting started with Perl
- Name "main::x" used only once: possible typo at ...
- Safety net (use strict; use warnings;) - video
- Scalar variables
- Symbolic references in Perl
- Variable declaration in Perl
- Why does this code not work? (split, array slice) - Solution
- strict
- use strict; and warnings; but no diagnostics
string
- String to number conversion - video
strings
- Strings in Perl: quoted, interpolated and escaped
study
- study
sub
- Defining subroutines - video
- Functions and Subroutines - video
- Passing two arrays to a function
- Python Lambda in Perl creating anonymous functions
- Returning multiple values or a list from a subroutine in Perl
- Subroutines and functions in Perl
- The curious case of implicit return
- Understanding recursive subroutines - traversing a directory tree
- Variable number of parameters in Perl subroutines
- sub
subroutine
- Subroutines and functions in Perl
Subroutines::ProhibitCallsToUndeclaredSubs
- Always require explicit importing of functions
Subscripts
- Subscripts
substr
- Analyze Apache log file - video
- How to break lines with max width? (wrap)
- How to get the last character of a string in Perl?
- Lvalue substr - replace part of a string
- Solution: display unique rows of a file - video
- Sorting mixed strings
- String functions: length, lc, uc, index, substr
- Substr - video
- substr outside of string at ...
subtest
- Organizing a test script with subtests
subtype
- Creating subtypes for Moose
Subversion
- How to convince Meta CPAN to show a link to the version control system of a distribution?
sum
- Sum numbers in a file - video
- min, max, sum in Perl using List::Util
sum0
- min, max, sum in Perl using List::Util
SVG
- Combining SVG and PSGI
- SVG - Scalable Vector Graphics
- SVG - Scalable Vector Graphics with Perl
- Venn diagram with SVG
SVN
- How to convince Meta CPAN to show a link to the version control system of a distribution?
svn:ignore
- Don't keep generated files in version control
switch
- Switch-Case statement in Perl 5
- Switching in Perl 5.10
Symbol Tables
- Symbol Tables
symbolic references
- Creating subroutines on the fly using Symbolic references
- Symbolic references in Perl
Symbolic Unary Operators
- Symbolic Unary Operators
symlink
- Unix and DOS commands - video
- symlink
symmetric_difference
- Sets in Perl using Set::Scalar
SYNOPSIS
- Packaging a Perl script and a Perl module
syntax error
- Scalar found where operator expected
syscall
- syscall
sysopen
- sysopen
sysread
- sysread
sysseek
- sysseek
system
- Create Linux user account - video
- Running external programs from Perl with system
- system
syswrite
- syswrite
Tablesorter
- Convert list to table and add jQuery tablesorting with Date column
TAP
- TAP - Test Anything Protocol
- Testing a simple Perl module
- prove, the harness
TAP::Formatter::HTML
- TAP - Test Anything Protocol
Task::Kensho
- MetaCPAN Task::Kensho - recommended Perl modules
tell
- seek - move the position in the filehandle in Perl
- tell
- tell how far have we read a file
telldir
- telldir
tempdir
- The 19 most important file-system tools in Perl 5
template
- Dancer2: Template Tiny
Template
- Introduction to Template::Toolkit
Template::Tiny
- Dancer2: Template Tiny
Template::Toolkit
- Add "404 Not Found" page
- Add another static page
- Dancer2: Template Toolkit
- Introduction to Template::Toolkit
- List authors where the PAUSEID starts with a given letter
- Show CPANstats on every page
- Start using Template Toolkit to show the empty pages
- Template Toolkit processing Hash of Hashes
Tenjin
- Tenjin templating system
Term::ReadLine
- History in the Perl debugger, make the up arrow work
Term::ReadLine::Gnu
- History in the Perl debugger, make the up arrow work
- Install Term::ReadLine::Gnu
Term::ReadPassword::Win32
- How to read a password on the command line?
- Password protecting web pages in Dancer 2
Terms and List Operators (Leftward)
- Terms and List Operators (Leftward)
test
- A test file in Perl
Test2
- Getting started testing Perl module with Test2
- Test2 capture warnings
Test2::Plugin::NoWarnings
- Test2 capture warnings
Test2::V0
- Getting started testing Perl module with Test2
Test::Builder
- Test::Builder object
- What is the status of the current test script?
Test::CheckManifest
- Skip tests if prerequisites are not installed
Test::Class
- GitHub Actions CI job for Perl Test::Class - checking downstream dependencies as well
Test::Code::TidyAll
- Run Perl::Tidy to beautify the code
- Skip tests if prerequisites are not installed
Test::Compile
- Check test coverage - add compile tests
Test::Deep
- Keep data in client and fetch only changes
- Testing a tree data structure in Perl
- Use of uninitialized value $got in pattern match (m//) at Test/Deep/Regexp.pm line 57.
Test::DistManifest
- Skip tests if prerequisites are not installed
Test::FailWarnings
- Testing for no warnings in Perl
Test::Harness
- TAP - Test Anything Protocol
- prove, the harness
Test::Mock::Simple
- Mocking function to fake environment
Test::MockTime
- Testing sessions by mocking time
Test::More
- 2: Michael Schwern on test automation and Git
- Bitbucket Pipelines testing Perl projects
- Checking a GitHub URL for existence
- Comparing complex data-structures using is_deeply
- Creating a testing module
- Dancer 1 test Hello World
- Dancer2: Testing Hello World
- Getting started - Create skeleton for the SCO clone application
- Implementing 'is_any' to test multiple expected values
- Moving over to Test::More
- Multiple expected values - testing dice
- Refactor the tests to use Test::More (Pod::Tree 1.20)
- Self testing Perl modules using the Modulino concept
- Start writing the Markua parser in Perl
- TODO - testing a bug or a future feature
- Test code which is using fork
- Test diagnostic messages using diag, note, and explain
- Testing Perl CGI application
- Testing timeout with cmp_ok
- Using 'like' to test without exact values
- What is the status of the current test script?
Test::NoWarnings
- Silencing the noisy Dancer tests
- Testing for no warnings in Perl
Test::Perl::Critic
- Finish Perl::Critic cleanup, set up Test::Perl::Critic
- Skip tests if prerequisites are not installed
Test::Pod
- Skip tests if prerequisites are not installed
Test::Pod::Coverage
- Skip tests if prerequisites are not installed
Test::Simple
- 2: Michael Schwern on test automation and Git
- Introducing test automation with Test::Simple
- Moving over to Test::More
- Refactoring large test suite - separating data from code
- Separating test data from test code
- Test plan and test descriptions
- Test without a Plan
- Testing a simple Perl module
Test::Version
- Skip tests if prerequisites are not installed
Test::VERSION
- Enforce the same version numbers in all the Perl modules in a distribution
Test::Warn
- Test for expected warnings
- Test for warnings in a Perl Module
- Testing for no warnings in Perl
Test::WWW::Mechanize
- Add some acceptance tests using search.cpan.org
Test::WWW::Mechanize::PSGI
- Dancer2: Sessions
testing
- 8: Chad (Exodist) Granum, author of the Fennec testing tool
- Adding GitHub Actions to Test2::Harness::UI
- Exploring BDD in Perl - using Test::BDD::Cucumber
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 1
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 2
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 3
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 4
- Exploring BDD in Perl - using Test::BDD::Cucumber - part 5 - with Erik Hülsmann
- Introducing CPANCover - Showing Test coverage reports of Perl modules
- Testing a simple Perl module
- Testing with Perl
tests
- Self testing Perl modules using the Modulino concept
Text
- Perl Tk text widget to be used as a console
Text::CSV
- CSV - Comma Separated Values and Perl
- How to combine arrays to a multi-dimensional array and save them to CSV file
- How to read a CSV file using Perl?
- How to replace a column in a CSV file using Perl
- How to splice a CSV file in Perl (filter columns of CSV file)
- Reading CSV file as many hash-es
- Split CSV file into multiple small CSV files
- Split up and flatten CSV file
Text::CSV_XS
- How to read a CSV file using Perl?
- Process CSV file using Text::CSV_XS - video
- Split CSV file into multiple small CSV files
Text::Lorem
- Generate Random Text with Perl using Text::Lorem
Text::Wrap
- How to break lines with max width? (wrap)
TextMade
- Editors and IDEs for Perl developers - video
TextPad
- Editors and IDEs for Perl developers - video
The Arrow Operator
- The Arrow Operator
TheSchwartz
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
TheSchwartz::Simple
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
TheSchwartz::Simple::Job
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
TheSchwartz::Worker
- How To Use TheSchwartz Perl Module
- How To Use TheSchwartz Perl Module (Part 2)
threads
- Can't use Net::Appliance::Session inside a thread
- Is it possible to share a FILEHANDLE between Threads?
- threads: Free to wrong pool
tie
- Sorted hash in Perl using Tie::IxHash
- tie
Tie::IxHash
- Sorted hash in Perl using Tie::IxHash
tied
- tied
time
- Compare the speed of Perl and Python regexes
- Epoch - The creation of the world
- Testing sessions by mocking time
- The year of 19100
- The year of 19100 - video
- time
Time::HiRes
- How to check if a child process is still running in Perl?
- The year of 19100
Time::Local
- Time::Local - Day '31' out of range 1..30
Time::Piece
- Exception handling in Perl: How to deal with fatal errors in external modules
times
- times
Tk
- App PerlTidy Tk version 0.01
- GUI with Perl for desktop applications
- Perl Tk text widget to be used as a console
- Perl Tk: Keyboard and Mouse events
- Perl Tk: The label, button, and entry widgets
- Perl Tk: The label, button, and entry widgets
Tk::bind
- Perl Tk: Keyboard and Mouse events
Tk::Button
- Perl Tk: The label, button, and entry widgets
Tk::Entry
- Perl Tk: The label, button, and entry widgets
Tk::Label
- Perl Tk: The label, button, and entry widgets
Tk::Menu
- Perl Tk: The label, button, and entry widgets
to_json
- Get CPANstats from MetaCPAN using cron
TO_JSON
- Add a date stamp to the items in the database
TODO
- TODO - testing a bug or a future feature
token
- Parse paragraphs with Regexp::Grammars
tolower
- lc
topic
- $_ the default variable of Perl
TPF
- Unofficial information about The Perl Foundation Grants
tr
- Replace character by character (transliterate) using tr of Perl
tr///
- tr///
transform
- Transforming a Perl array using map
Travis-CI
- Enable Travis-CI for Continuous Integration
- How to contribute to an Open Source Perl project
- Periodic CI for dormant code
- Removal of the current directory (".") from @INC in Perl 5.26 and Travis-CI
- Skip tests if prerequisites are not installed
- Travis-CI for the Markua Parser project
- Using Travis-CI and installing Geo::IP on Linux and OSX
trim
- trim - removing leading and trailing white spaces with Perl
- trim - video
true
- Boolean values in Perl
- True False - video
- true
- true
- undef - defined - true -false
truncate
- Open file to read and write in Perl, oh and lock it too
- truncate
TSV
- Multiple command line counters with plain TSV text file back-end
tv
- 10: Dave Miller, the leader of the Bugzilla project
- 1: Jeffrey Thalhammer, author of Perl::Critic and Pinto
- 2: Michael Schwern on test automation and Git
- 3: Dave Rolsky, author of DateTime and tons of other modules
- 4: Tadeusz Sośnierz author of the Perl 6 Pod Parser and Panda, the Perl 6 module installer
- 5: Stevan Little, author of Moose and Moe
- 6: John SJ Anderson, a biologist turned into sysadmin
- 7: Jay Hannah, Chief Ticket Monkey of the Perl Mongers
- 8: Chad (Exodist) Granum, author of the Fennec testing tool
- 9: Neil Bowers - PAUSE and CPAN admin
Twiggy
- Asynchronous web application with PSGI and Twiggy
type
- Add attributes to Markua - round 1
type conversion
- Automatic string to number conversion or casting in Perl
Typeglobs and Filehandles
- Typeglobs and Filehandles
uc
- How to check if a string is all upper case (lower case) characters?
- String functions: length, lc, uc, index, substr
- uc
ucfirst
- ucfirst
Ultra Edit
- Editors and IDEs for Perl developers - video
umask
- umask
undef
- Boolean values in Perl
- How to eliminate a value in the middle of an array in Perl?
- How to return nothing (or undef) from a function in Perl?
- Scalar values and variables - video
- Scalar variables
- Use of uninitialized value
- defined
- undef
- undef - defined - true -false
- undef - video
- undef in Perl
- undef on Perl arrays and hashes
- undef, the initial value and the defined function of Perl
Unicode
- How to create an Indian Rupee symbol with Perl code
- What is Unicode
- What is a text file and what is a binary file?
uninitialized
- Selectively ignore warnings (turn them off with no warnings)
uninitialized value
- Use of uninitialized value
union
- Sets in Perl using Set::Scalar
uniq
- Merge hashes of arrays
- Unique values in an array in Perl
- Unique values in an array reference in Perl
unique
- Unique values in an array in Perl
- Unique values in an array reference in Perl
UNITCHECK
- UNITCHECK
UNIVERSAL
- Class as type constraint
UNIX
- Download and install Perl
unknown warnings
- Unknown warnings category
unless
- Statement modifiers: reversed if statements
unlink
- How to remove, copy or rename a file with Perl
- Unix and DOS commands - video
- unlink
unpack
- Read fixed width records - using unpack - video
- unpack
unpairs
- Operations on value-pairs in Perl
unshift
- Manipulating Perl arrays: shift, unshift, push, pop
- shift and unshift - video
- unshift
- unshift - to insert an element to the beginning of an array
untie
- untie
unzip
- unzip using Archive::Any of Perl
update
- Updating MongoDB using Perl
upload
- Dancer2: Upload file
upper
- uc
uppercase
- uc
upsert
- Command line counter in Perl with MongoDB as storage
URL
- How does the world wide web work?
use
- How to change @INC to find Perl modules in non-standard locations
- How to create a Perl Module for code reuse?
- Modulino: both script and module in Perl
- What is @INC in Perl?
- What is the difference between require and use in Perl? What does import do?
- use
use vars
- Package variables and Lexical variables in Perl
- Variable declaration in Perl
UTF-8
- How to check if a string is all upper case (lower case) characters?
- Open and read from text files
- What is Unicode
- What is a text file and what is a binary file?
- Writing to files with Perl
utf8
- Always use 3-argument open
- chr
- input must be 8 bytes long at DES.pm line 58. while using Net::SFTP
- ord
UTF8
- How to create an Indian Rupee symbol with Perl code
Util::Any
- List and Array Utilities in Perl
utime
- utime
v5.10
- Smart Matching in Perl 5.10
- Switching in Perl 5.10
- What's new in Perl 5.10? say, //, state
Vagrant
- PDE - Perl Development Environment
- Upgrade Vagrant Perl Development Environment
- Vagrant Perl Development Environment (VirtualBox)
value
- Hashes in Perl
values
- Create hash from two arrays: keys and values
- How to sort a hash in Perl?
- How to sort a hash of hashes by value?
- values
ValuesAndExpressions::ProhibitAccessOfPrivateData
- Private Member Data shouldn't be accessed directly - encapsulation violation
variable
- $_ the default variable of Perl
Variable names
- Variable names
vars
- Variable declaration in Perl
VCS
- CPAN Digger explained
- How to convince Meta CPAN to show a link to the version control system of a distribution?
- Perl modules on CPAN having links to VCS and having CI configured
vec
- vec
Venn
- Venn diagram with SVG
version
- How to compare version numbers in Perl and for CPAN modules
- Perl::Version vs version confusion
- Which Version of Perl are you using?
Version Strings
- Version Strings
video
- Advanced Perl Maven video course
- Beginner Perl Maven video course - video
- Perl Maven Products
- Perl videos and screencasts
videos
- Perl on YouTube
vim
- Editors and IDEs for Perl developers - video
- Perl Editor
VirtualBox
- PDE - Perl Development Environment
- Vagrant Perl Development Environment (VirtualBox)
VPS
- Getting started with Perl Dancer on Digital Ocean
VS Code
- Dancer2: Hello World with Visual Studio Code
VSTRING
- ref - What kind of reference is this variable?
wait
- How to check if a child process is still running in Perl?
- Using fork in Perl to spread load to multiple cores
- wait
waitpid
- How to check if a child process is still running in Perl?
- Using fork in Perl to spread load to multiple cores
- waitpid
want
- What return is expected from a function?
Want
- What return is expected from a function?
wantarray
- How to return nothing (or undef) from a function in Perl?
- wantarray
- wantarray - returning list or scalar based on context
warn
- Common Warnings and Error messages in Perl
- Warning when something goes wrong
- warn
warnings
- Always use strict and use warnings in your perl code!
- Always use warnings in your Perl code!
- Argument ... isn't numeric in numeric ...
- Can't locate ... in @INC
- Can't use string (...) as an HASH ref while "strict refs" in use at ...
- Create a lexical warning that can be turned on and off with the "warnings" pragma.
- Deep recursion on subroutine
- How to capture and save warnings in Perl
- Installing and getting started with Perl
- Name "main::x" used only once: possible typo at ...
- Possible precedence issue with control flow operator
- Safety net (use strict; use warnings;) - video
- Selectively ignore warnings (turn them off with no warnings)
- Test for warnings in a Perl Module
- Unknown warnings category
- Use of uninitialized value
- Useless use of hash element in void context
- Useless use of private variable in void context
- Why does this code not work? (split, array slice) - Solution
- readline() on closed filehandle in Perl
- substr outside of string at ...
- use strict; and warnings; but no diagnostics
warnings::enabled
- Create a lexical warning that can be turned on and off with the "warnings" pragma.
warnings::warnif
- Create a lexical warning that can be turned on and off with the "warnings" pragma.
weaken
- Eliminate circular reference memory-leak using weaken
web
- Web sites powered by Perl with Open Source code-base
Web sites
- Perl Infrastructure
Web::Query
- Web Scraping TED - list of talks
WebService::GData
- Fetching data from YouTube using Perl
WebService::GData::YouTube
- Fetching data from YouTube using Perl
wget
- A Simple way to download many web pages using Perl
when
- Switch-Case statement in Perl 5
- Switching in Perl 5.10
while
- while loop
- while loop - video
while (1)
- while loop
White Camel
- Chris Nandor
Win32::GUI
- GUI with Perl for desktop applications
Win32::IEAutomation
- Can't locate Object method "cells" via Win32::IEAutomation
Windows
- Dancer2: Plackup reload on Windows and Linux
- Download and install Perl
WNOHANG
- How to check if a child process is still running in Perl?
wrap
- How to break lines with max width? (wrap)
write
- Writing to files with Perl
- write
write_file
- How to replace a string in a file with Perl
WWW::Gittip
- Web scraping with HTML::TreeBuilder
WWW::Mechanize
- Checking a valueless checkbox with WWW::Mechanize
- How to download a Perl module from CPAN
- Set HTTP headers with WWW-Mechanize
- Using object oriented modules - video
Wx
- GUI with Perl for desktop applications
wxWdigets
- GUI with Perl for desktop applications
x
- /x modifier for verbose regexes - video
- Scalar variables
- String operators - video
- String operators: concatenation (.), repetition (x)
x_contributors
- Adding list of contributors to the CPAN META files
xdigit
- Regex matching digits
xls
- How to create an Excel file with Perl?
xlsx
- How to create an Excel file with Perl?
XML
- Count elements using XML::XPath
- Data Serialization in Perl
- How does the world wide web work?
- How to preserve XML::Simple element order
- XML and Perl
- XML::Simple sorting
- XML::Writer examples
XML::LibXML
- How to preserve XML::Simple element order
XML::Simple
- How to preserve XML::Simple element order
- XML::Simple sorting
XML::Writer
- XML::Writer examples
XML::XPath
- Count elements using XML::XPath
- cpan install XML::XPath
XMP
- Perl syntax to inject external XMP data into image files
xor
- Logical Operators in Perl - video
y
- Replace character by character (transliterate) using tr of Perl
y///
- y///
YAML
- Counter example using YAML file to store the data
- Data Serialization in Perl
- Profiling and 100 times speed improvement
- Read YAML file
- Travis-CI for the Markua Parser project
- Write YAML file
- YAML in Perl
- YAML vs YAML::XS inconsistencies (YAML::Syck and YAML::Tiny too)
YAML::Any
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YouTube
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yum
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zip
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{}
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|
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|=
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||
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||=
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~~
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