如何在js中拆分字符串，但有一些例外 [英] how to split a string in js with some exceptions

问题描述

我有这个字符串：

a\,bcde,fgh,ijk\,lmno,pqrst\,uv

我需要一个JavaScript函数，它将每个分割字符串，但只有那些不的人才有 \ 才能

I need a JavaScript function that will split the string by every , but only those that don't have a \ before them

如何做到这一点？

推荐答案

这是我能想出的最短的事情：

Here's the shortest thing I could come up with:

'a\\,bcde,fgh,ijk\\,lmno,pqrst\\,uv'.replace(/([^\\]),/g, '$1\u000B').split('\u000B')

背后的想法是找到逗号没有前缀为反斜杠的每个地方，用字符串替换那些不常见的字符串，然后用 uncommon string。

The idea behind is to find every place where comma isn't prefixed with a backslash, replace those with string that is uncommon to come up in your strings and then split by that uncommon string.

请注意，逗号之前的反斜杠必须使用其他反斜杠转义。否则，javascript将表单 \，视为转义逗号并生成一个逗号！换句话说，如果你不能逃避反斜杠，javascript会看到： a \，bcde，fgh，ijk \，lmno，pqrst \，uv 这样 a，bcde，fgh，ijk，lmno，pqrst，uv 。

Note that backslashes before commas have to be escaped using another backslash. Otherwise, javascript treats form \, as escaped comma and produce simply a comma out of it! In other words if you won't escape the backslash, javascript sees this: a\,bcde,fgh,ijk\,lmno,pqrst\,uv as this a,bcde,fgh,ijk,lmno,pqrst,uv.

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