English

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Etymology

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Deverbal from look behind.

Noun

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lookbehind (countable and uncountable, plural lookbehinds)

  1. (regular expressions) The analysis of the preceding characters before the regular expression is matched.
    • 2004, Mehran Habibi, Java Regular Expressions: Taming the java.util.regex Engine[1]:
      [There] are times when it's useful to be able to look to the left of the current position being considered to see what the past had to say about a particular pattern. That is the purpose of lookbehinds.

Hypernyms

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Hyponyms

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