Question

Possible Duplicate:
Javascript Regex: How to put a variable inside a regular expression?

I’m using the following for as regex pattnern in a sinon.js fakeServer response:

/https:\/\/ca-davstorage:8080\/myFile.json(\?.*|$)/

I would like to replace myFile with a variable, but as I’m not really good at regex, I’m struggling to get it to work.
Currently I have this, but it does not seem to work.

'https:\\/\\/ca-davstorage:8080\\/'+myFile+'.json(\\?.*|$)/'

Question:
How to I correctly add a variable to a regex?

Thanks for help!

Answer 1

Instead of using /regex/ use the constructor function RegExp.

Example:

var foo = 'bar',
    re = new RegExp('[0-9]' + foo, 'g');
re.test('1bar'); //true

The first argument of the RegExp constructor is the regular expression, the second one is the modifier.