How to sort array on key value in javaScript using Prototype library

We  can sort a JSON  array using this method:

1. This is the method to sort the array:

   Array.prototype.sortOn = function(key){
       this.sort(function(a, b){
           if(a[key] < b[key]){
               return -1;
           }else if(a[key] > b[key]){
               return 1;
           }
           return 0;
       });
   }
   
   

2. How to sort the array with data? Just do:

   var arr = [{name:'bob', artist:'rudy'},{name:'johhny', artist:'drusko'},{name:'tiff', artist:'needell'},{name:'top', artist:'gear'}];
   arr.sortOn("name");
   arr.sortOn("artist");

If we want to convert the array to JSON we have to do this:

1. var array = [];
   for ( var i=1 ; i< arr.length; i++ ){
           var mComponente = {
   	        name	: 'bob',
   	        artist  : 'rudy',
   	};
           array.push(mComponente);
   }
   
   // convert array into JSON array
   var jsonArray = $.parseJSON(JSON.stringify(array));
   

Reference link: http://stackoverflow.com/questions/16648076/sort-array-on-key-value