Nodejs Array Average avarage()

Method Source Code

Array.prototype.avarage = function()
{
    return this.sum() / this.length;
}
Array.prototype.sum = function()
{
    var sum = 0;/*from  w  w w . ja  va 2s . c  o m*/
    for(var i = this.length; -- i >= 0 ;)
    {
        sum += (this[i] === null || this[i] === undefined) ? 0 : this[i];
    }

    return sum;
}

Related

1. average()

   Array.prototype.average = function() {
     var avg = 0;
     this.forEach(function(val) {
       avg += val;
     });
     return avg / this.length;
   };
   

2. average()

   Array.prototype.average = function () {
     return this.sum() / this.length
   

3. average()

   Array.prototype.average = function(){
     return this.reduce( (a,b) => a + b, 0) / this.length
   

4. average()

   Array.prototype.average = function () {
     return this.sum() / this.length;
   };
   console.log([1, 2, 3, 4].average());