Javascript regex split on first slash

Question

I have a string like this: "one/two/three/four" and I just want to return:

"one"
"two/three/four"

I'm not the greatest with regex expressions to split on, so was wondering if someone could help.

Alexis King · Accepted Answer · 2015-01-27 04:51:15Z

2

Just use String.prototype.split.

var components = "one/two/three/four".split("/");
console.log(components[0]);
console.log(components.slice(1).join("/"));

This will print:

one
two/three/four

edited Jan 27, 2015 at 4:51

answered Jan 27, 2015 at 4:37

Alexis King

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2 Comments

user663031 Over a year ago

This doesn't work because the 1 argument to split limits the returned array to one element. Remove it and you should be fine.

Alexis King Over a year ago

@torazaburo You're right, I seriously have no idea why that 1 was there. I've removed it.

user2096091 · Accepted Answer · 2015-01-27 04:41:23Z

1

Looks like this will work as well (although it does return an extra blank string):

"one/two/three/four".split(/\/(.+)?/)

answered Jan 27, 2015 at 4:41

user2096091

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Comments

Alex Vazhev · Accepted Answer · 2015-01-27 04:41:54Z

0

You can use indexOf()

<script>

function mySplit(s) {
    var pos = s.indexOf('/');
    if (pos != -1) return [s.substring(0,pos), s.substring(pos+1)];
    else return s;
}

console.log(mySplit('one/two/three/four'));
console.log(mySplit('test'));

</script>

answered Jan 27, 2015 at 4:41

Alex Vazhev

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Comments

user663031 · Accepted Answer · 2015-01-27 04:56:53Z

0

Use a regexp as follows

var regex   = /(.*?)\/(.*)/;
var string  = "one/two/three/four";
var matches = string.match(regex);

console.log(matches[1], matches{2])

>> one two/three/four

In English, the regexp reads:

Match any string up to but not including a slash
Match everything after that

answered Jan 27, 2015 at 4:56

user663031

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