Swapping two items in a javascript array [duplicate]

Question

Possible Duplicate:
Javascript swap array elements

I have a array like this:

this.myArray = [0,1,2,3,4,5,6,7,8,9]; 

Now what I want to do is, swap positions of two items give their positions. For example, i want to swap item 4 (which is 3) with item 8 (which is 7) Which should result in:

this.myArray = [0,1,2,7,4,5,6,3,8,9]; 

How can I achieve this?

Answer 1

The return value from a splice is the element(s) that was removed-

no need of a temp variable

Array.prototype.swapItems = function(a, b){     this[a] = this.splice(b, 1, this[a])[0];     return this; }  var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];  alert(arr.swapItems(3, 7)); 

returned value: (Array)

    0,1,2,7,4,5,6,3,8,9