Nodejs Utililty Methods Number Format

Number.prototype.formatBytes = function() {
    var units = ['Bytes', 'KBytes', 'MBytes', 'GBytes'],
        bytes = this,
        i;
    for (i = 0; bytes >= 1024 && i < 3; i++) {
        bytes /= 1024;
    return bytes.toFixed(2) + ' ' + units[i];
};
...

Number.prototype.formatComma = function() {
  var n = this;
  var thouSeparator = thouSeparator == undefined ? "," : thouSeparator;
  var sign = n < 0 ? "-" : "";
  var i = parseInt(n = Math.abs(+n || 0)) + "";
  var j = (j = i.length) > 3 ? j % 3 : 0;
  return sign + (j ? i.substr(0, j) + thouSeparator : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thouSeparator); 
};

Number.prototype.formatCustom = function(c, d, t){
var n = this, 
    c = isNaN(c = Math.abs(c)) ? 2 : c, 
    d = d == undefined ? "." : d, 
    t = t == undefined ? "," : t, 
    s = n < 0 ? "-" : "", 
    i = String(parseInt(n = Math.abs(Number(n) || 0).toFixed(c))), 
    j = (j = i.length) > 3 ? j % 3 : 0;
   return s + (j ? i.substr(0, j) + t : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + t) + (c ? d + Math.abs(n - i).toFixed(c).slice(2) : "");
...

Number.prototype.formatDecimal = function() {
  var nStr = this.toFixed(2);
  x = nStr.split('.');
  x1 = x[0];
  x2 = x.length > 1 ? '.' + x[1] : '';
  var rgx = /(\d+)(\d{3})/;
  while (rgx.test(x1)) {
    x1 = x1.replace(rgx, '$1' + ',' + '$2');
  return x1 + x2;
};

Number.prototype.formatHuman = function() {
  var numStr   = '' + this;
  var numParts = numStr.split('.');
  var whole    = numParts[0];
  var decimal  = numParts[1] || '';
  var re = /(\d+)(\d{3})/;
  while (re.test(whole)) {
    whole = whole.replace(re, '$1' + ',' + '$2');
  return decimal.length === 0 ? whole : whole + '.' + decimal;
};

'use strict';
Number.prototype.format = function format(n, x) {
  const re = `\\d(?=(\\d{${x || 3}})+${(n > 0 ? '\\.' : '$')})`;
  return this.toFixed(Math.max(0, ~~n)).replace(new RegExp(re, 'g'), '$&,');
};
String.prototype.rpad = function rpad(padString, length) {
  let str = this;
  while (str.length < length) {
    str = str + padString;
...

Number.prototype.formatted = function(){
  if (!this) return 0;
  var sign   = this < 0 ? '-' : '',
    num    = Math.floor(Math.abs(this)*100+0.50000000001),
    cents  = (num % 100).toString().substring(0, 2);
  num = Math.floor(num/100).toString();
  for (var i = 0, l = Math.floor((num.length-1)/3), p = 3; i < l; i++, p += 4){
    num = num.substring(0, num.length - p) + ' ' + num.substring(num.length - p);
  return sign + num + '.' + (cents < 10 ? '0' + cents : cents);
};

Object.defineProperty( Number.prototype, "toSize", {
    "get": function() {
        return function( bitsNotBytes ) {
            var sizes = ['', ' Kb', ' Mb', ' Gb', ' Tb', ' Pb' ];
            var unit  = 0, remain = Math.abs( this * 1 );
            if ( bitsNotBytes )
                remain *= 8;
            while ( remain >= 1024 && unit<5 )
                remain /= 1024, unit++;
...

Number.prototype.CommaFormatted = function(n,symbol) {
  return (symbol || '\uffe5') + this.toFixed(n === void 0 ? 2 : n).toString().replace(/(\d)(?=(\d{3})+($|\.))/g, '$1,');
};
(4564546).CommaFormatted(2,"$");

String.prototype.numberFormat=function() {
   return this.replace(/(\d)(?=(?:\d{3})+(?!\d))/g,'$1,');
function numberformatter(vNum){
  return String(vNum).numberFormat();