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Regular Expression
Test String
Substitution
August 27, 2001
This Agreement ("Agreement") is entered into and is effective as of August 27, 2001 ("Effective Date") by and between ATI Technologies, Inc., an Ontario corporation with a place of business at 33 Commerce Valley Drive East, Markham, Ontario Canada L3T 7N6 ("ATI"), on behalf of itself and its subsidiaries, and Evans & Sutherland Computer Corporation, a Utah corporation with a place of business at 600 Komas Drive, Salt Lake City, Utah 84158 USA ("Licensee").Comments
Top Regular Expressions
Url checker with or without http:// or https://
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Simple date dd/mm/yyyy
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Url Validation Regex | Regular Expression - Taha
Match an email address
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match whole word
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Match anything enclosed by square brackets.
Match or Validate phone number
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Find Substring within a string that begins and ends with paranthesis
Simple date dd/mm/yyyy
Blocking site with unblocked games
Match dates (M/D/YY, M/D/YYY, MM/DD/YY, MM/DD/YYYY)
Cheat Sheet
| Character classes | |
|---|---|
| . | any character except newline |
| \w \d \s | word, digit, whitespace |
| \W \D \S | not word, digit, whitespace |
| [abc] | any of a, b, or c |
| [^abc] | not a, b, or c |
| [a-g] | character between a & g |
| Anchors | |
| ^abc$ | start / end of the string |
| \b | word boundary |
| Escaped characters | |
| \. \* \\ | escaped special characters |
| \t \n \r | tab, linefeed, carriage return |
| \u00A9 | unicode escaped © |
| Groups & Lookaround | |
| (abc) | capture group |
| \1 | backreference to group #1 |
| (?:abc) | non-capturing group |
| (?=abc) | positive lookahead |
| (?!abc) | negative lookahead |
| Quantifiers & Alternation | |
| a* a+ a? | 0 or more, 1 or more, 0 or 1 |
| a{5} a{2,} | exactly five, two or more |
| a{1,3} | between one & three |
| a+? a{2,}? | match as few as possible |
| ab|cd | match ab or cd |
