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colinux/gist:1793893

Created February 10, 2012 23:13
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Regex to match a string which does not contain another string or pattern
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gistfile1.md

  1. Matches strings not containing foo. (fast)

    /(?:[^f]+|f(?!oo))*/

  2. Matches strings not containing PATTERN (slow). s modifier is required if the . can match a new line.

    /(?:(?!PATTERN).)*/s

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