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[英]Why can't you use repetition quantifiers in zero-width look behind assertions?
[英]Splitting a string on two zero-width assertions
我想通过将其拆分为两个零宽度的断言来隔离字符串中的数字。 我可以先分开
strsplit("nursereviewday36_arm_1", "(?<=[[:alpha:]])(?=[[:digit:]])", perl = T)
这样它才能返回
[[1]]
[1] "nursereviewday" "36_arm_1"
但是我想分成三部分
[[1]]
[1] "nursereviewday" "36" "_arm_1"
这在R中,但是解决此问题的任何正则表达式都可以
尝试这个:
(?<=[[:alpha:]])(?=[[:digit:]])|(?<=[[:digit:]])(?=_)
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