Javascript: strip out non-numeric characters from string

Question

Consider a non-DOM scenario where you'd want to remove all non-numeric characters from a string.

var myString = 'abc123.8<blah>';

//desired output is 1238

Question: How would you achieve this in plain Javascript? Please remember this is a non-DOM scenario, so jQuery and other solutions involving browser and keypress events aren't suitable.

Answer 1

Something along the lines of:

yourString = yourString.replace ( /[^0-9]/g, '' );

Answer 2

You can use a RegExp to replace all the non-digit characters:

var myString = 'abc123.8<blah>';
myString = myString.replace(/[^\d]/g, ''); // 1238

Answer 3

Use a regular expression, if your script implementation supports them. Something like:

myString.replace(/[^0-9]/g, '');

Answer 4

I would use something very similar to what CMS posted. However, rather than manually complementing \d, I would use the built-in complement \D.

myString = myString.replace(/\D/g,'');