Nodejs Array Square square()

Method Source Code

// http://www.codewars.com/kata/525d50d2037b7acd6e000534/train/javascript

Array.prototype.square = function () {
  return this.map(function (e) {
    return e * e;
  });/*from  ww  w.  j  a va 2s.c o m*/
};

Related

1. square()

   Array.prototype.square = function(){
     return Array.from(this, x => x * x)
   

2. square()

   Array.prototype.square = function(){
       return this.map((element) =>  Math.pow(element,2));}
   ==
   Array.prototype.cube = function(){
       return this.map((element) =>  Math.pow(element,3));}
   

3. square()

   Array.prototype.square = function () {
     return this.map(function(n) { 
       return n * n; 
     });
   

4. square()

   Array.prototype.square = function () {
     return this.map((item) => {
       return Math.pow(item, 2);
     });
   };
   

5. square()

   Array.prototype.square = function(){
       return this.map(function(e){
           return (e * e);
       });
   };
   Array.prototype.cube = function(){
       return this.map(function(e){
           return (e * e * e);
       });
   ...
   

6. square()

   Array.prototype.square = function (){
     var result = this.map(function(v){
         return v*v;
     });
     return result;
   };
   Array.prototype.cube = function (){
     var result = this.map(function(v){
       return v*v*v;
   ...
   

7. square()

   Array.prototype.square = function () { return this.map(elem => elem*elem); }
   Array.prototype.cube = function() { return this.map(elem => Math.pow(elem, 3)); }
   Array.prototype.average = function () { return this.length > 0 ? this.reduce((a,b) => a+b) / this.length : NaN;  }
   Array.prototype.sum = function () { return this.reduce((a,b) => a+b); }
   Array.prototype.even = function () { return this.filter(elem => elem % 2 === 0); }
   Array.prototype.odd = function () { return this.filter(elem => elem % 2 > 0); }