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Strings in Perl: quoted, interpolated and escaped
strings in single quotes - video
Don't keep generated files in version control
$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
Time::Local - Day '31' out of range 1..30
Using 'like' to test without exact values
What's new in Perl 5.10? say, //, state
Implementing 'is_any' to test multiple expected values
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 ...
Does the 'all' function of List::MoreUtils really short-circuit?
The 'if' statement - video
Can't locate object method "..." via package "1" (perhaps you forgot to load "1"?)
Private Member Data shouldn't be accessed directly - encapsulation violation
Don't interpolate in printf (Missing argument in sprintf at ...)
Can't locate inc/Module/Install.pm in @INC (you may need to install the inc::Module::Install module) (@INC contains: ...)
Can't use Net::Appliance::Session inside a thread
Don't put & in-front of subroutines in Perl