Nodejs Array Convert toHash()

Method Source Code

Array.prototype.toHash = function()
{
// returns hash of { item : true, ... } for all unique items in array
    var r = new Hashtable();
    this.forEach(function (item) { r.put(item, true); });
    return r;/*from  ww  w.j  ava2s .co m*/
}

Related

1. toForty()

   Array.prototype.toForty = function(){
       var start = 2;
       var end = 40;
       for(var i = start; i <= end; i += 2){
           this.push(i);
      return this;
   var oneToForty = [].toForty();
   ...
   

2. toForty()

   Array.prototype.toForty  = function() {
     return Array.range(40, 2);
   };
   

3. toForty()

   Array.prototype.toForty = function(){
     b = [];
     for(i=2; i<=40; i+=2){
       b.push(i);
     return b
   

4. toForty()

   Array.prototype.toForty = function() {
     'use strict';
     var arr = [];
     for (var i = 2; i <= 40; i += 2) {
       arr.push(i);
     return arr;
   };
   

5. toHash()

   Array.prototype.toHash = function(){
     var map = {}
     for(var i = 0;i < this.length; i++)
       map[this[i]] = ''
     return map
   };
   

6. toHexArray()

   Array.prototype.toHexArray = function() {
       var hex_array = [];
       for (var i=0; i < this.length; i++) {
           var val;
           if (typeof(this[i]) === "string") {
               val = parseInt(this[i], 2).toString(16);
           else if (typeof(this[i]) === "number") {
               val = this[i].toString(16);
   ...
   

7. toIntArray()

   Array.prototype.toIntArray = function() {
       var int_array = [];
       for (var i=0; i < this.length; i++) {
           var val = parseInt(this[i], 2);
           int_array.push(val);
       return int_array;
   };
   

8. toInts()

   Array.prototype.toInts = function(){
     return this.map(function(val){
       return parseInt(val, 10);
     });
   };
   

9. toJSON()

   Array.prototype.toJSON = function(){
       var result = [];
       this.forEach(function(item,index){
           result.push( item.toJSON ? item.toJSON() : item );
       });
       return result;