Is there a way to clone an array in jQuery?

Question

This is my code:

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

Does 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(); 

JSFiddle - http://jsfiddle.net/neoswf/ebuk5/

Answer 2

How about jQuery.merge ?

 copy = $.merge([], a); 

Answer 3

Edit

b = $. clone (a) to b = $ (this) .clone (a) but doesn't work for a while

but reported

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

Solution you use simple built-in javascript clone function

 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

Great alternative

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

-John Resig

Check similar entry

• What is the most efficient way to deeply clone an object in JavaScript?

Answer 4

Here is how I did it:

 var newArray = JSON.parse(JSON.stringify(orgArray)); 

this will create a new deep copy that is not associated with the first (not a shallow copy).

also this, obviously, will not clone events and functions, but it’s good that you can do it in one line and it can be used for any object king (arrays, strings, numbers, objects ...)

Answer 5

to 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

 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 6

Another option is to use Array.concat:

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

Answer 7

 var a=[1,2,3] b=JSON.parse(JSON.stringify(a)); document.getElementById("demo").innerHTML = b; 

 <p id="demo"></p> 

Answer 8

ES6 Please use the distribution

 let arrayCopy = [...myArray];