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.

Answer 1

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

Answer 2

看起来这也可以工作（尽管它确实返回了一个额外的空白字符串）：

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

Answer 3

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>

Answer 4

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