Cleanor Regex Cheat Sheet - Tokens, Quantifiers and Flags - Reference

Oct 13, 2026

Upload by aboduw

Cleanor Regex Cheat Sheet summarizes practical regular expression syntax for matching patterns in text, aligned with JavaScript, Python, PCRE, and most regex engines. It lists common regex tokens such as character classes (× digit, word, whitespace), anchors (^, $), word boundaries, capturing and non-capturing groups, alternation, backreferences, and lookahead/lookbehind constructs. The sheet also covers quantifiers (*, +, ?, {n}, {n,}, {n,m}) and engine flags like global (g), case-insensitive (i), and multiline (m).

LanguageEnglish

CategoryGeneral

FormatPDF

Pages1

AccessFree to download

Regex Tokens

Character classes, anchors, boundaries

Groups, alternation, backreferences, lookaround

Quantifiers and Flags

Quantifiers: *, +, ?, {n}

Flags: g, i, m

FAQs

Which regex engines does this cheat sheet target?

It notes compatibility with JavaScript, Python, PCRE, and most regex engines.

What quantifiers are included for repetition control?

It lists *, +, ?, and the forms {n}, {n,}, and {n,m} to match 0-or-more, 1-or-more, optional, and fixed/ranged counts.

What do the flags g, i, and m mean?

g finds all matches globally, i enables case-insensitive matching, and m enables multiline mode where ^ and $ apply per line.

Oct 13, 2026

Upload by aboduw