Question

182

rated 0 times [ 185] [ 3] / answers: 1 / hits: 154369 / 12 Years ago, mon, october 22, 2012, 12:00:00

I want to remove all special characters and spaces from a string and replace with an underscore.
The string is

    var str = hello world & hello universe;

I have this now which replaces only spaces:

      str.replace(/s/g, _);

The result I get is hello_world_&_hello_universe, but I would like to remove the special symbols as well.

I tried this str.replace(/[^a-zA-Z0-9]s/g, _) but this does not help.

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4 Years ago

answered 12 Years ago quentinaveryb · Accepted Answer

Your regular expression [^a-zA-Z0-9]s/g says match any character that is not a number or letter followed by a space.

Remove the s and you should get what you are after if you want a _ for every special character.

var newString = str.replace(/[^A-Z0-9]/ig, _);

That will result in hello_world___hello_universe

If you want it to be single underscores use a + to match multiple

var newString = str.replace(/[^A-Z0-9]+/ig, _);

That will result in hello_world_hello_universe