等价于Perl的\ Q ... \ E或quotemeta()的Javascript [英] Javascript equivalent of Perl's \Q ... \E or quotemeta()

问题描述

在Perl正则表达式中，您可以用\Q和\E包围子表达式，以表明您希望将该子表达式作为文字字符串进行匹配，即使其中存在元字符也是如此.您还具有quotemeta函数，该函数可在字符串中插入正确数量的反斜杠，因此，如果随后将该字符串内插到正则表达式中，则无论其内容是什么，它都将按字面值进行匹配.

Javascript(在主要浏览器中部署的)是否具有等效的内置?我可以写我自己的东西，但是我想知道是否不必打扰.

解决方案

没有此类内置功能.<​​/p>

建议您不要研究自己的，而应该研究一下 regex转义功能.互联网.

该页面提出了以下解决方案(通过 Colin Snover ):

RegExp.escape = function(text) {
    return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
}

或建议使用 XRegExp 库.

In Perl regular expressions, you can surround a subexpression with \Q and \E to indicate that you want that subexpression to be matched as a literal string even if there are metacharacters in there. You also have the quotemeta function that inserts exactly the right number of backslashes in a string so that if you subsequently interpolate that string into a regular expression, it will be matched literally, no matter what its contents were.

Does Javascript (as deployed in major browsers) have any built in equivalent? I can write my own just fine, but I would like to know if I don't have to bother.

解决方案

There is no such built-in feature.

Rather than implementing your own, I advise you look into the multitude of regex escape functions available on the internet.

That page proposes the following solution (by Colin Snover):

RegExp.escape = function(text) {
    return text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
}

or advises to use the XRegExp library.

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