我想让正则表达式捕获两个分隔符之间的模式的所有实例。
一个字符模式的简化示例(目标:捕获第一个 b 和最后一个 x 之间的所有 z ):
bbxabbcbacbedbzbb
^^ ^ ^ ^
b s。我试过
.*x.*(b).*z.*只捕获最后一个 b . ( rubular )
最佳答案
用
(?:x|(?<!\A)\G).*?\Kb(?=.*z)
说明
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(?: group, but do not capture:
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x 'x'
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| OR
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(?<! look behind to see if there is not:
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\A the beginning of the string
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) end of look-behind
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\G where the last m//g left off
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) end of grouping
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.*? any character except \n (0 or more times
(matching the least amount possible))
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\K match reset operator (omits matched text)
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b 'b'
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(?= look ahead to see if there is:
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.* any character except line breaks (0 or more times
(matching the most amount possible))
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z 'z'
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) end of look-ahead
关于正则表达式多次匹配捕获组，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/66832287/