正则表达式在比赛前返回单词 [英] Regex to return the word before the match
问题描述
我一直在尝试在比赛之前提取单词.例如，我有以下句子:
I've been trying to extract the word before the match. For example, I have the following sentence:
" Allatoona是位于佐治亚州巴托县东南部的一个小镇."
我想提取"Bartow"之前的词.
I want to extract the word before "Bartow".
我已经尝试过以下正则表达式来提取该单词:
I've tried the following regex to extract that word:
\w\sCounty,
当我想要的只是Bartow一词时，我得到的是"w县".
What I get returned is "w County" when what I wanted is just the word Bartow.
任何帮助将不胜感激.谢谢！
Any assistance would be greatly appreciated. Thanks!
推荐答案
您可以在正则表达式中使用此正则表达式在 County 之前查找单词:
You can use this regex with a lookahead to find word before County:
\w+(?=\s+County)
(?= \ s + County)是肯定的超前行为，它断言在当前匹配之前存在1个或多个空格，后跟单词 County .
(?=\s+County) is a positive lookahead that asserts presence of 1 or more whitespaces followed by word County ahead of current match.
如果要避免超前，则可以使用捕获组:
If you want to avoid lookahead then you can use a capture group:
(\w+)\s+County
并从匹配结果中提取捕获的#1组.
and extract captured group #1 from match result.
这篇关于正则表达式在比赛前返回单词的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
