Nodejs Array Average average()

Method Source Code

Array.prototype.average = function() {
   var avg = 0;/*from   w ww .j  a  v a 2  s . co  m*/
   this.forEach(function(val) {
      avg += val;
   });
   return avg / this.length;
};

Related

1. avarage()

   Array.prototype.avarage = function()
       return this.sum() / this.length;
   Array.prototype.sum = function()
       var sum = 0;
       for(var i = this.length; -- i >= 0 ;)
           sum += (this[i] === null || this[i] === undefined) ? 0 : this[i];
       return sum;
   

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());
   

5. average()

   Array.prototype.average = function () {
     return (!this.length) ? NaN : this.reduce((acc, value) => {
       return acc + value;
     }) / this.length;
   };