Nodejs Number Calculate timesTwo(x)

Method Source Code

var x = new Number(2);
console.log(x);/*from   w ww.jav  a 2s  .co  m*/

//Add a prototype
Number.prototype.timesTwo = function(x){
   return x * 2;
};

console.log(x.timesTwo(x));

console.log(Number.isNaN(x));

//Polyfill
Number.isInteger = Number.isInteger || function(x){
   return typeof x === "number" &&
   isFinite(x) &&
   Math.floor(x) === x;
};

//Get Number object value in accordance with browser settings.
console.log(x.toLocaleString());

//JS toString
console.log(x.toString());

//View object constructor
console.log(x.constructor);

Related

1. plus(num)

   Number.prototype.plus = function(num) {
     return this + num
   };
   Number.prototype.minus = function(num) {
     return this - num
   };
   Number.prototype.multi = function(num) {
     return this * num
   debug((5).plus(3).minus(6))
   debug((5).multi((3).plus(2)))
   debug(6..multi(2..plus(2)))
   function add(x) {
     return function(y) {
       return function(z) {
         return x + y + z
   debug(add(2) + '\n\n')
   debug(add(2)(3) + '\n\n')
   debug(add(2)(3)(5) + '\n\n')
   

2. times()

   Number.prototype.times = function () {
       return _.times(this, function (i) {
           return i;
       });
   };
   

3. times()

   Number.prototype.times = function () {
     var a = [];
     var i = -1;
     while (++i < this) {
       a.push(i);
     return a;
   };
   

4. timesPlusOne()

   Number.prototype.timesPlusOne = function () {
       return _.map(this.times(), function (i) {
           return i + 1;
       });
   };
   

5. timesRepeat(f)

   Number.prototype.timesRepeat = function(f){
     for(var i=0; i<this; i++){
       f();
   

6. clone(handler)

   Number.prototype.clone = function(handler) {
     return new this.constructor(this);
   };
   

7. concat(value)

   Number.prototype.concat = Number.prototype.concat || function (value) {
     let number = this;
     let digits = exports.digitLength(value);
     number *= Math.pow(10, digits);
     return number + value;
   };
   

8. cos()

   Number.prototype.cos = function() {
       return Math.cos(this);
   

9. countDecimals()

   Number.prototype.countDecimals = function () {
       if(Math.floor(this.valueOf()) === this.valueOf()) return 0;
       return this.toString().split(".")[1].length || 0;