Nodejs Utililty Methods Number Calculate

Number.prototype.plus = function ( num ) {
  return this + num;
};
Number.prototype.minus = function ( num ) {
  return this - num;
};
Number.prototype.multiple = function ( num ) {
  return this * num;
};
...

Number.prototype.plus = function() {
    if ((arguments.length == 0) || (arguments.length > 1) || isNaN(arguments[0]))return;
    return Number(this.toString()) + Number(arguments[0].toString());
};
Number.prototype.minus = function() {
    if ((arguments.length == 0) || (arguments.length > 1) || isNaN(arguments[0]))return;
    return Number(this.toString()) - Number(arguments[0].toString());
};
console.log(2);
...

function calcfibonacciNumbers() {
  var i,
      nm = [];
  nm[0] = 0;
  for(i=1; i<10; i++) {
    if(i==1) {
      nm[i] = nm[i-1] + 1;
      console.log (nm[i]);
    } else {
...

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')

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

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

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

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

var x = new Number(2);
console.log(x);
Number.prototype.timesTwo = function(x){
  return x * 2;
};
console.log(x.timesTwo(x));
console.log(Number.isNaN(x));
Number.isInteger = Number.isInteger || function(x){
  return typeof x === "number" &&
...

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