Nodejs Array Average avg()

Method Source Code

Array.prototype.avg = function(){
   return this.sum() / this.length;
};
Array.prototype.sum = function(){
   for (var i = 0, sum = 0 ; i != this.length; ++i) {
      var n = this[i];
      if(!isNaN(n)) {
         sum += n*1;/* w w w  .j ava 2s.c o  m*/
      }
   }
   return sum;
};

Related

1. 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;
   };
   

2. average()

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

3. average()

   Array.prototype.average = function(){
     var sum = 0;
     for (var i of this){
       sum += i;
     return sum / this.length;
   

4. average(arr)

   Array.prototype.average = function(arr) {
     if(!arr) arr = this;
     var len =  arr.length, i, avg = 0;
     for( i = 0; i < len; i++ ) {
       avg += arr[i];
     return avg / len;
   

5. average(fun)

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

6. avg()

   Array.prototype.avg = function() {
     var av, num, _i, _len;
     av = 0;
     for (_i = 0, _len = this.length; _i < _len; _i++) {
       num = this[_i];
       av = av + num;
     return av / this.length;
   };
   ...
   

7. avg()

   Array.prototype.avg = function() {
     var av = 0;
     var cnt = 0;
     var len = this.length;
     for (var i = 0; i < len; i++) {
       var e = +this[i];
       if(!e && this[i] !== 0 && this[i] !== '0') e--;
       if (this[i] == e) {av += e; cnt++;} }
     return av/cnt;
   ...
   

8. avg()

   Array.prototype.avg = function () {
     var sum=0;
     var drops=this.drops();
     for (var i = 0; i < this.length; i++)
       if (+this[i] !== 0)
         sum += +this[i];
     return (sum/(this.length-drops));
   

9. findAverage()

   Array.prototype.findAverage = function(){
       var length = this.length;
       var average = 0;
       for(var i = 0; i < length; i++){
           var value = this[i];
           average += value;
       return average / length;
   var numbers = [1, 34, 5, 17, 2, 3, 90];
   var average = numbers.findAverage();
   for(key in numbers) {
       var message = key + ' = ' + numbers[key];
       if(numbers[key] < average){
           message += ' \\/'
       else {
           message += ' /\\'
       console.log(message);