Nodejs Array Average average()

Method Source Code

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

console.log([1, 2, 3, 4].average());//from w  w  w . jav a 2 s.  co m

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

3. average()

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

4. average()

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

5. average()

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

6. average()

   Array.prototype.average = function()
     if (this.length < 1) {
         return Number.NaN;
     return this.sum() / this.length;
   

7. average()

   Array.prototype.average = function () {
       var sum = 0, j = 0;
       for (var i = 0; i < this.length, isFinite(this[i]); i++) {
           sum += parseFloat(this[i]); ++j;
       return j ? sum / j : 0;
   };
   

8. average()

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