JavaScript - extract using regex group

Question

Is it possible to extract a regex group value pattern of a string?

For example, the following code gives

var str = "alpha bravo charlie delta";
var regex = /\s(\w+)\s(\w+)/
var value = str.replace(regex, "$1_$2"); // Gives alphabravo_charlie delta

What I am looking for is something like,

var value = str.extract(regex, "$1_$2"); // Which should give bravo_charlie

While str.extract doesn't exist, is there any other way I can get same results?

Niels · Accepted Answer · 2013-04-22 17:03:54Z

4

You can do this:

var str = "alpha bravo charlie delta";
var regex = /\s(\w+)\s(\w+)/;
var value = "";
str.replace(regex, function($0, $1, $2){
    value = $1 + "_" + $2;
});

alert(value);

answered Apr 22, 2013 at 17:03

Niels

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r0dney · Accepted Answer · 2013-04-22 17:05:16Z

1

You can use String.match()

var array = str.match(regex);

answered Apr 22, 2013 at 17:05

r0dney

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