Nodejs Array Multiply multipleConcat()

Method Source Code

/*//  w w  w .  j a  v  a  2 s . c  o m
To test:

var array1 = [1,2,3];
var array2 = [4,5,6];
var array3 = [7,8,9];
console.log(array1.multipleConcat(array1, array2, array3)); // [1, 2, 3, 4, 5, 6, 7, 8, 9];
*/

Array.prototype.multipleConcat = function() {
    var initialArray = arguments[0];
    if (arguments.length > 0) {
      for (var i = 1, arrayCount = arguments.length; i < arrayCount; i++ ) {
        initialArray.push.apply(initialArray, arguments[i]);
      }
      return initialArray;
    }
};

Related

1. mul(value)

   Array.prototype.mul = function(value) {
     var newArray = new Array();
     for(var i=0; i<this.length; i++) {
       newArray[i] = this[i] * value;
       return newArray;
   

2. mult(other)

   Array.prototype.mult = function(other) {
       if(isFinite(other))  
           other = new Array(this.length).fill(other);
       else
           console.assert(this.length == other.length, 'mult: len(a) != len(b)');
       var ret = new Array(this.length);
       for(var i = 0; i < ret.length; i++)
           ret[i] = this[i] * other[i];
       return ret;
   ...
   

3. mult2()

   Array.prototype.mult2 = function() {
       for (var i = 0; i < this.length; i++) {
           this[i] = this[i] * 2;
   };
   

4. multiples(multiple)

   Array.prototype.multiples = function(multiple) {
     var multiples = [];
     for (var i = 0; i < this.length; i++){
       multiples.push(this[i] * multiple);
     return multiples;
   console.log([1,2,3,4,5].multiples(5));
   Array.prototype.myEach = function(someFunction){
   ...
   

5. multiply(a2)

   Array.prototype.multiply = function(a2) {
     var l1 = this.length;
     var l2 = a2.length;
     var len = (l1 < l2 ? l1 : l2);
     var result = new Array(len);
     for (var i = 0; i < len; i++) {
       result[i] = this[i] * a2[i];
     return result;
   ...
   

6. multiply(n)

   Array.prototype.multiply = function(n){
     results = []
     for (var i = 0; i < this.length; i++){
       for (var j = 0; j < n; j++){
         results.push(this[i])
     return results
   

7. multiplyByTwo()

   Array.prototype.multiplyByTwo = function() {
     var newArr = [];
     for (var i = 0; i < this.length; i++) {
       newArr.push(this[i] * 2)
     return newArr;
   };
   console.log([1, 2, 3].multiplyByTwo());
   Array.prototype.myEach = function(func) {
   ...