Is there a method to clone an array in jQuery?

Question

This is my code :

var a=[1,2,3]
b=$.clone(a)
alert(b)

Doesn't jQuery have a 'clone' method? How can I clone an array using jQuery?

Answer 1

Just use Array.prototype.slice.

a = [1];
b = a.slice();

Answer 2

try

if (! Array.prototype.clone ) {
  Array.prototype.clone = function() {
    var arr1 = new Array();
    for (var property in this) {
        arr1[property] = typeof(this[property]) == 'object' ? this[property].clone() : this[property]
    }
    return arr1;
  }​
}

use as

var a=[1,2,3]
b=a;
a.push(4)
alert(b); // alerts [1,2,3,4]
//---------------///
var a = [1, 2, 3]
b = a.clone();
a.push(4)
alert(b); // alerts [1,2,3]​

Answer 3

var a=[1,2,3]
var b=[];
jQuery.extend(b,a);
alert(b);

Answer 4

Change

b=$.clone(a) to b=$(this).clone(a) but it some time dont work

but is reported

http://www.fusioncube.net/index.php/jquery-clone-bug-in-internet-explorer

Solution you use simple inbuilt clone function of javascript

var a=[1,2,3];
b=clone(a);
alert(b);

function clone(obj){
    if(obj == null || typeof(obj) != 'object')
        return obj;
    var temp = obj.constructor();
    for(var key in obj)
        temp[key] = clone(obj[key]);
    return temp;
}

-ConroyP

A great alternative is

 // Shallow copy
  var b = jQuery.extend({}, a);

  // Deep copy
  var b = jQuery.extend(true, {}, a);

-John Resig

Check similar post

• http://stackoverflow.com/questions/122102/what-is-the-most-efficient-way-to-clone-a-javascript-object

Answer 5

Another option is to use Array.concat:

var a=[1,2,3]
var b=[].concat(a);