Nodejs Number Calculate ordenar()

Method Source Code

#!/usr/bin/env node//from   w  w  w  .  j av  a 2s.c  o  m
/*
# 052-samedigits.rb
#   juanfc 2010-12-08
# http://projecteuler.net/index.php?section=problems&page=2
# 52.
# Find the smallest positive integer, x, such that 2x, 3x, 4x, 5x, and 6x,
# contain the same digits in some order.
*/

Number.prototype.ordenar = function () {
  return this.toString().split('').sort(up).join('');
};

function up (a,b) {
  return a > b ? 1 : a < b ? -1 : 0;
}

var x = 0;
var done= false;
var s;
do {
  x+= 1;
  s= x.ordenar();
  done= (s === (2*x).ordenar()) && (s === (3*x).ordenar()) && (s === (4*x).ordenar()) && (s === (5*x).ordenar()) && (s === (6*x).ordenar());
} while (!done);

console.log([x,2*x,3*x,4*x,5*x,6*x]);

Related

1. min(minimum)

   Number.prototype.min = function(minimum) {
       if (this.valueOf() < minimum){
         return minimum;
       } else {
         return this.valueOf();
   };
   

2. modNumber.prototype.mod || (n)

   Number.prototype.mod = Number.prototype.mod || function(n) {
     return ((this%n)+n)%n;
   

3. mult()

   Number.prototype.mult = function() {
       var w = this;
       for (var i = 0; i < arguments.length; i += 1)
           w *= arguments[i];
       return w;
   var n = 12;
   console.log(n.mult(2, 3));
   console.log((5).mult(2, n));
   ...
   

4. next()

   Number.prototype.next = function(){
       return this+1;
   };
   

5. normalize(num)

   Number.prototype.normalize = function(num) {
     return this*180/num;
   };
   

6. ordinal()

   Number.prototype.ordinal = function () {
       return this + (
           (this % 10 == 1 && this % 100 != 11) ? 'st' :
           (this % 10 == 2 && this % 100 != 12) ? 'nd' :
           (this % 10 == 3 && this % 100 != 13) ? 'rd' : 'th'
           );
   var ResetInput = function(){
       jQuery('input, textarea').each(function() {
   ...
   

7. ordinalize()

   Number.prototype.ordinalize = function() {
       var abs = Math.abs(this);
       if (abs % 100 >= 11 && abs % 100 <= 13) {
           return this + 'th';
       abs = abs % 10;
       if (abs === 1) { return this + 'st'; }
       if (abs === 2) { return this + 'nd'; }
       if (abs === 3) { return this + 'rd'; }
   ...
   

8. parseNumber(x)

   function parseNumber(x){
     if(!isNaN(x)) return x;
     return parseFloat(x.substring(1, x.length - 1));
   

9. percentage(val)

   Number.prototype.percentage = function(val){
     return this * (val/100);
   };