Last Updated :2025/12/04

positive lookbehind

Noun
countable uncountable
Japanese Meaning
肯定的後読み: 正規表現において、マッチする位置の直前に特定のパターンが存在するかを確認する機能。 / 注: この文脈では、指定した正規表現パターンの直前に求める文字列がある場合にマッチが成功する条件を提示する構文を意味する。
What is this buttons?

複雑な正規表現を作成するとき、特定の文字の直前にあることを確認する肯定の後読み(?<=)をよく使います。

plural

Quizzes for review

(regular expressions) The analysis of the preceding characters presence before the regular expression is matched (symbol: ?<=).

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positive lookbehind

When writing complex regexes, I often rely on a positive lookbehind to ensure the match only occurs after specific characters.

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When writing complex regexes, I often rely on a positive lookbehind to ensure the match only occurs after specific characters.

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