Own for each for array in JavaScript.

raoEach.js

var array_list = [1,2,3,4,5,3];

Array.prototype.raoEach = function(cb){
	for (i = 0; i < this.length; i++) {
        cb(this[i]);
    }
}

array_list.raoEach(function(a){
	console.log(a+2);
});

This is updated code for also return index position.

var array_list = [1,2,3,4,5,3];
Array.prototype.raoEach = function(cb){
for (i = 0; i < this.length; i++) {
cb(this[i] , i);
}
}

array_list.raoEach(function(a,index){
console.log(a+2 , index);
});