Trouble With JavaScript Regex Code To Match Characters And Numbers

I would like help with solving a problem using regular expressions. I've written the following JavaScript code: var s = '/Date(1341118800000)/'; var regex = new RegExp('^/Date\(\d+

Solution 1:

The escape slashes are already consumed by the string, i.e. "\(" === "(". The resulting unescaped string is passed to new RegExp, which interprets ( as a special character.

You should use a regular expression literal and escape the /s as well:

var regex = /^\/Date\(\d+\)\/$/;

To test whether a string matches, you can use:

regex.test(s);

Solution 2:

The problem is that "/^/Date\(\d+\)/$/" converts to "/^/Date(d+)/$/" in javascript.

"/^/Date\(\d+\)/$/" == "/^/Date(d+)/$/" // returns true

So just escape the backspace, \, to fix the problem.

var regex = new RegExp('^/Date\\(\\d+\\)/$');

Solution 3:

I believe you are looking for this code:

var s = '/Date(1341118800000)/';
s = s.match(/^\/Date\((\d+)\)\/$/)[1];
alert(s);

Test it here.