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Learn to extract delimited data in Perl using non-greedy capture groups. This guide covers the greedy vs non-greedy quantifier behavior, multi-line matching with /s modifier, global extraction with /g, and practical verification techniques.
Vim's magic setting silently changes what your regex metacharacters mean. Here's how explicit \v and \V prefixes, range limits, and the n flag make substitutions predictable and safe.
Learn how to use Emacs incremental search with regular expressions to find and edit patterns quickly in large files.
A decision guide for Rexx log parsing: when the built-in PARSE instruction is enough, when the RXREGEX library earns its dependency, and a script that validates both against the same line.
Goal: Ensure that a regex safelist pattern such as /bg-(red|blue)/ retains not only the base utilities ( bg-red-500 , bg-blue-500 ) but also their variant‑prefixed forms ( hover:bg-red-500 , focus:bg-blue-500 ) in the final CSS output. Constraint: In Tailwind CSS v3 the safelist implementation evaluates regex patterns against the exact class name only; varia
perl
rexx
tailwindcss