replace one string with another in javascript

Question

How can I replace parts of one string with another in javascript? No jQuery.

For example if I wanted to replace all spaces (" ") is "The quick brown fox jumped over the lazy dog". with plus ("+").

I'm looking for something like PHP's str_replace and that hopefully doesn't involved regex.

@MattBurland I've learned or been taught that its best to not use regex when you don't have to. — Django Johnson
– Django Johnson, Commented Jun 18, 2013 at 14:23
Well that's a silly attitude. You should learn how and when to use them instead of believing some silly restriction. — Matt Burland
– Matt Burland, Commented Jun 18, 2013 at 14:30

jAndy · Accepted Answer · 2013-06-18 14:04:21Z

11

Javascripts very own String.prototype.replace()^MDN method to the rescue.

"The quick brown fox jumped over the lazy dog".replace( /\s+/g, '+' );

Be aware that .replace() will not modify an existing string in place, but will return a new string value.

If you for some reason don't want to have any RegExp involved, you have to do the dirty work yourself, for instance

var foo = 'The quick brown fox jumped over the lazy dog';

foo.split( '' ).map(function( letter ) {
    return letter === ' ' ? '+' : letter;
}).join('');

But you would have to check for any kind of white-space character here, to be on-level with the RegExp solution.

edited Jun 18, 2013 at 14:04

answered Jun 18, 2013 at 13:57

jAndy

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