Split variable from last slash

I have a variable var1/var2/var3. I want to store var3 the part after last slash in a variable and the part before that (var1/var2/) in another variable. How can I do this?

You can use lastIndexOf to get the last variable and that to get the rest.

var rest = str.substring(0, str.lastIndexOf("/") + 1);
var last = str.substring(str.lastIndexOf("/") + 1, str.length);

Example on jsfiddle.

var str = "var1/var2/var3";

var rest = str.substring(0, str.lastIndexOf("/") + 1);
var last = str.substring(str.lastIndexOf("/") + 1, str.length);
console.log(rest);
console.log(last);

Try something like this:

var vars = "var1/var2/var3";
var arrVars = vars.split("/");
var lastVar = arrVars.pop();
var restVar = arrVars.join("/");
alert(lastVar);
alert(restVar);

var last  = url.split("/").pop();
console.log(last);

You can get last piece of url with array pop method.

var txt = "var1/var2/var3";
txt = txt.split('/')
 
var Var1 = txt.pop();
var Var2 = txt[0]+'/'+txt[1];
 
alert(Var1);
alert(Var2);

You can use a split and then pull the last index of it, like so :

Example:

var string = 'var1/var2/var3';

var result = string.split('/');         //Splits into an array

//var final = result[result.length -1]; //Grabs last value
//result.pop();                         //Removes last value

var final = result.pop();               //Removes last value and grap the last value
var previous = result.join('/');        //Grabs the previous part

alert("Previous: " + previous + ", Final Part: " + final);  //Alerts results

Demo:

Demo

Use this function:

function splitLast(s, sep = ' ') {
    /* Split `s` on the last occurrence of `sep` and return both parts 
       as an array, [left,right]; or return ["",s] if no occurrence was found. 
    */
    let right = s.split(sep).pop()
    let left  = s.substring(0, s.length - right.length - sep.length)
    return [left, right]
}

Call it like:

let [left, right] = splitLast('var1/var2/var3', '/')
// left:  "var1/var2"
// right: "var3"

string.substring(start,end)

where

start = Required. The position where to start the extraction. First character is at index 0

end = Optional. The position (up to, but not including) where to end the extraction. If omitted, it extracts the rest of the string

    var string = "var1/var2/var3";
    
    start   = string.lastIndexOf('/');  //console.log(start); o/p:- 9
    end     = string.length;            //console.log(end);   o/p:- 14
    
    var string_before_last_slash = string.substring(0, start);
    console.log(string_before_last_slash);//o/p:- var1/var2
    
    var string_after_last_slash = string.substring(start+1, end);
    console.log(string_after_last_slash);//o/p:- var3

OR

    var string_after_last_slash = string.substring(start+1);
    console.log(string_after_last_slash);//o/p:- var3

Solution using regex, might not be the fastest, but takes less space and might be more readable.

"var1/var2/var3".split(/\/(?=[^\/]+$)/)

• \/ – Match a slash
• (?= – If it's followed by
  • [^\/]+ – Anything but slashes.
  • $ – And the end of the string
• )

The simplest solution is to use javascript:

var str = "var1/var2/var3/var4/var5";
var splitted = str.split("/");
var first = "";
for (var i=0; i<splitted.length-1; i++) {
    first += splitted[i] + "/";
}

var second = "";
if (splitted.length > 0) {
    second = splitted[splitted.length-1];
}

alert(first); // var1/var2/var3/var4/
alert(second); // var5

edited: but the shortest solution will be: substring() use

You can also repeatedly do replace(), split(), and join() on the string to get the desired result

let str = 'var1/var2/var3';

str = str.split('').reverse().join('').split(/\/(.+)/).map(x => x.split('').reverse().join('')).reverse().filter(x => x);

console.log(str);

Explanation:

str
  .split('') /* ['v', 'a', 'r', '/', 'v', 'a', ...] */
  .reverse() /* ['3', 'r', 'a', 'v', '/', 'r', ...] */
  .join('') /* '3rav/2rav/1rav' */
  .split(/\/(.+)/) /* ['3rav', '2rav/1rav', ''] */
  .map(x => x.split('').reverse().join('')) /* ['var3', 'var1/var2', ''] */
  .reverse() /* ['', 'var1/var2', 'var3'] */
  .filter(x => x) /* ['var/var2', 'var3'] */

With ES20, and new time coding, it is much simpler:

"asd/asdff/aksdmmf/uuu".split('/')["asd/asdff/aksdmmf/uuu".split('/').length -1]

it will provide you "uuu". Thanks