Regex Character Classes in Perl

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How To Match Perl Regular Expressions Effortlessly

trichev.com/blog » Blog Archive Perl. Regular... | trichev.com/blog

perlre - Perl regular expressions - Perldoc Browser

Регулярные выражения в Perl

Perl | Regex Cheat Sheet - GeeksforGeeks

perl - Space character in regex is not recognised - Stack Overflow

Regular expressions in Perl - a summary with examples

perlrecharclass - Perl Regular Expression Character Classes