Extend Native Objects
by Mohan[ Edit ] 2012-09-20 22:30:50
Extend Native Objects
Even though some JavaScript gurus do not recommend this technique, it has been used by some frameworks. It allows you to create some helper methods, to the JavaScript API.
//We create the method prototype for our arrays
//It only sums numeric elements
Array.prototype.sum = function(){
var len = this.length;
total = 0;
for(var i=0;i<len ;i++){
if(typeof this[i]!= 'number') continue;
total += this[i];
}
return total;
}
var myArray = [1,2,3,'hola'];
myArray.sum();
Array.prototype.max = function(){
return Math.max.apply('',this);
}
