逃避正则表达式字符串？ [英] Escape regexp strings?

问题描述

我记得有一种方法可以让一个非常长的字符串Regex逃脱。

I recall there was a way to have a very long string Regex escaped.

我认为我使用了新的Regexp但是我不记得怎么做了。

I think I used new Regexp but I can't recall how to do it.

这里的任何人都知道怎么做？

Anyone here who knows how?

推荐答案

建议你转过来使用新的RegExp（，转换为正则表达式对象，如下所示：

Suggest you turn it into a string and then convert to a regex object using new RegExp(, as shown below:

var rxstr = "[\d]" + 
            "[\w]";
var rx = new RegExp(rxstr);

或者您可以尝试（以格式为代价）：

Or you could try (at the expense of formatting):

var x = "test";
var rxstr = "[\d]\
[\w]";
var rx = new RegExp(rxstr);
alert(rx);

后者更快，因为它不会创建一些新的字符串，但可能会被忽视。

The latter is faster as it does not create a number of new strings, but could be agued to be less readable.

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