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• Unix and DOS commands - video

• Memoization - speeding up function calls by caching of return values

• undef - defined - true -false

• Loop controls: next, last, continue, break

• Tools to package Perl scripts, modules, and applications

• Loop controls: next last - video

• Special Literals: __END__

• $a - $b - Special variables when using sort(). Don't use them for anything else besides your sort function!

• MetaCPAN URLs and Issues

• Levels of security using (R)?ex

• Conditional statements, using if, else, elsif in Perl

• Exploring BDD in Perl - using Test::BDD::Cucumber - part 5 - with Erik Hülsmann

• 3: Dave Rolsky, author of DateTime and tons of other modules

• Add test coverage reporting with Coveralls to Markua Parser in Perl

• Get Coveralls to notify when test-coverage shrinks

• The 19 most important file-system tools in Perl 5

• Using GitHub Actions (CI) to locate missing test dependencies in Dist::Zilla::PERLSRVDE

• Eliminating indirect method calls

• Indexing e-mails in an mbox

• Converting indirect calls