regex - Regex lookahead part of group accepted

Question

I'm using regex in powershell 5.1.

I need it to detect groups of numbers, but ignore groups followed or preceeded by /, so from this it should detect only 9876.

[regex]::matches('9876 1234/56',‘(?<!/)([0-9]{1,}(?!(\/[0-9])))’).value

As it is now, the result is:

9876

123

6

More examples: "13 17 10/20" should only match 13 and 17.

Tried using something like (?!(\/([0-9]{1,}))), but it did not help.

score 3 · Accepted Answer

您可以使用

\b(?<!/)[0-9]+\b(?!/[0-9])

或者，如果数字可以粘贴到文本上：

(?<![/0-9])[0-9]+(?!/?[0-9])

第一个模式基于单词边界\b，确保_在预期匹配之前和之后没有字母、数字和正确。第二个只是确保没有数字并且/在比赛的两端。

细节

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