negative lookahead

名词 n.

英文释义

名词 n.
  1. The analysis of the subsequent characters absence before the regular expression is matched (symbol: ?!). countable,uncountable
    — Negative lookahead works just like positive lookahead, except that whereas positive lookahead matches when the regex inside the lookahead matches, negative lookahead matches when the regex inside the lookahead failed to match.

词形变化

negative lookaheads plural

词源

From negative + lookahead.
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