如何在 jQuery/Javascript 中将变量传递给正则表达式
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How to pass a variable into regex in jQuery/Javascript
提问by Jonathan Lonowski
Is there a way to pass a variable into a regex in jQuery/Javascript?
有没有办法将变量传递给 jQuery/Javascript 中的正则表达式？
I wanna do something like:
我想做这样的事情：
var variable_regex = "bar";
var some_string = "foobar";
some_string.match(/variable_regex/);
In Ruby you would be able to do:
在 Ruby 中，您可以执行以下操作：
some_string.match(/#{variable_regex}/)
some_string.match(/#{variable_regex}/)
Found a useful post:
找到一个有用的帖子：
采纳答案by Jonathan Lonowski
It's easy:
这很简单：
var variable_regex = "bar";
var some_string = "foobar";
some_string.match(variable_regex);
Just lose the //. If you want to use complex regexes, you can use string concatenation:
只是失去了//。如果要使用复杂的正则表达式，可以使用字符串连接：
var variable_regex = "b.";
var some_string = "foobar";
alert (some_string.match("f.*"+variable_regex));
回答by Jonathan Lonowski
Javascript doesn't support interpolation like Ruby -- you have to use the RegExpconstructor:
Javascript 不支持像 Ruby 那样的插值——你必须使用RegExp构造函数：
var aString = "foobar";
var pattern = "bar";
var matches = aString.match(new RegExp(pattern));
