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REGEX

Word Boundaries


Word Boundaries

A "word boundary" denotes one of three possible positions:

  • before the first character in a string (if the first character is a word character)
  • after the last character in a string (if the last character is a word character)
  • between two characters in a string (where one is a word character and the other is not)

The metacharacter \b allows you to perform a word boundary. To negate this, use \B, meaning "not at word boundary".

Some regular expression engines also support \< and \> for start-of-word and end-of-word boundaries.



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