新的Regexp不起作用 [英] new Regexp doesn't work

问题描述

我正在尝试将以下表达式转换为new Regexp（）样式：

I'm trying to convert following expression to "new Regexp()" style:

http://jsfiddle.net/HDWBZ/

var Wyrazenie = /\btest[a-z]*/g;

我真的很困惑，不知道如何修复它。以下是我所做的，但显然它不起作用。

I'm really confused with it and have no idea how to fix it. Below is what I've done but obviously it doesn't work.

var Wyraznie = new RegExp("\btest[a-z]*","g");

还有一个问题，如果不是测试，我会使用变量吗？

Also have a question how would it look if instead of "test" I would use variable?

推荐答案

你应该改用它......

You should use this instead...

new RegExp("\\btest[a-z]*", "g");

...如 \b 将当JavaScript解析器通过相应的字符串文字工作时，可以插入到单（无斜线）字符中。解决方案是逃避斜线本身。

... as \b will be interpolated into a single (slashless) character when JavaScript parser works through the corresponding string literal. The solution is to escape slash itself.

DEMO： http://jsfiddle.net/HDWBZ/1/

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