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• /x modifier for verbose regexes - video

• Scalar variables

• String operators - video

• String operators: concatenation (.), repetition (x)

• Check several regexes on many strings

• Loop controls: next last - video

• Loop controls: next, last, continue, break

• Understanding dates using regular expressions

• Generate test expectations for the Markua parser

• Exchange values and keys of a hash - how to reverse a hash

• How to create an Excel file with Perl?

• Checking a GitHub URL for existence

• Comparing complex data-structures using is_deeply

• Implementing 'is_any' to test multiple expected values

• Multiple expected values - testing dice

• Test diagnostic messages using diag, note, and explain

• Using 'like' to test without exact values

• How to rename multiple files with one command on Windows, Linux, or Mac?

• Serving static files such as favicon.ico and robots.txt using Plack

• min, max, sum in Perl using List::Util