Nodejs Number to Base Convert base(b,c)

Method Source Code

Number.prototype.define("base", function(b, c) {
  var s = "", n = this
  if (b > (c = (c || "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz").split("")).length || b < 2) {
    return ""
  }/*  w  w  w. j  a  va 2 s. c o  m*/
  while (n) {
    s = c[n % b] + s, n = Math.floor(n / b)
  }
  return s
})

Related

1. toBase(base)

   "use strict";
   Number.prototype.toBase = function (base) {
       var symbols = 
       "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".split("");
       var decimal = this;
       var conversion = "";
       if (base > symbols.length || base <= 1) {
           return false;
       while (decimal >= 1) {
           conversion = symbols[(decimal - (base * Math.floor(decimal / base)))] + 
                        conversion;
           decimal = Math.floor(decimal / base);
       return (base < 11) ? parseInt(conversion) : conversion;
   

2. toBijectiveBase26( ()

   Number.prototype.toBijectiveBase26 = (function () {
     return function toBijectiveBase26() {
       n = this
       ret = "";
       while(parseInt(n)>0){
         --n;
         ret += String.fromCharCode("A".charCodeAt(0)+(n%26));
         n/=26;
       return ret.split("").reverse().join("");
     };
   }());