Languages
Regular Expressions Cheat Sheet
Print-ready cheat sheet for Regular Expressions, organized for fast lookup, study, and desk-side use
Sample
What's in this cheat sheet
- Basic Patterns
- Character Classes
- Quantifiers
- Anchors
- Groups & Alternation
- Lookahead & Lookbehind
- Common Patterns
- Flags
Metacharacters
. | Any character (except newline) |
^ | Start of string / line |
$ | End of string / line |
* | 0 or more of previous |
+ | 1 or more of previous |
? | 0 or 1 of previous (optional) |
\ | Escape metacharacter |
Literal Matching
hello # matches "hello" exactly
a.c # matches "abc", "a1c", "a-c", etc.
\.txt # matches literal ".txt"
Download the full cheat sheet for all sections, formatted for print
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