Nodejs Utililty Methods Money Format

Number.prototype.formatMoney = function(decimalPart, currencySymbol, decimalDivider, thousandDivider){
    var n = this,
        c = isNaN(decimalPart = Math.abs(decimalPart)) ? 2 : decimalPart,
        d = decimalDivider == undefined ? "." : decimalDivider,
        t = thousandDivider == undefined ? " " : thousandDivider,
        s = n < 0 ? "-" : "",
        i = parseInt(n = Math.abs(+n || 0).toFixed(c)) + "",
        j = (j = i.length) > 3 ? j % 3 : 0,
        a = currencySymbol == (undefined || "")? "" : " "+currencySymbol;
...

Number.prototype.formatMoney = function(groupsDelimeter, fractionLength, fractionDelimeter){
  var n = this,
    c = isNaN(fractionLength = Math.abs(fractionLength)) ? 2 : fractionLength,
    d = fractionDelimeter == undefined ? "." : fractionDelimeter,
    t = groupsDelimeter == undefined ? "," : groupsDelimeter,
    s = n < 0 ? "-" : "",
    i = parseInt(n = Math.abs(+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.formatMoney = function (places, symbol, thousand) {
    places = !isNaN(places = Math.abs(places)) ? places : 2;
    symbol = symbol !== undefined ? symbol : "$";
    thousand = thousand || ",";
    var number = this,
        negative = number < 0 ? "-" : "",
        i = parseInt(number = Math.abs(+number || 0).toFixed(places), 10) + "",
        j = (j = i.length) > 3 ? j % 3 : 0;
    return symbol + negative + (j ? i.substr(0, j) + thousand : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thousand);
...

Number.prototype.formatMoney = function(places, symbol, thousand, decimal) {
    places = !isNaN(places = Math.abs(places)) ? places : 2;
    symbol = symbol !== undefined ? symbol : "$";
    thousand = thousand || ",";
    decimal = decimal || ".";
    var number = this,
        negative = number < 0 ? "-" : "",
        i = parseInt(number = Math.abs(+number || 0).toFixed(places), 10) + "",
        j = (j = i.length) > 3 ? j % 3 : 0;
...

Number.prototype.formatMoney = function (places, symbol, thousand, decimal) {
  places = !isNaN(places = Math.abs(places)) ? places : 2;
  symbol = symbol !== undefined ? symbol : "$";
  thousand = thousand || ",";
  decimal = decimal || ".";
  let number = this,
    negative = number < 0 ? "-" : "",
    i = parseInt(number = Math.abs(+number || 0).toFixed(places), 10) + "",
    j = (j = i.length) > 3 ? j % 3 : 0;
...

Number.prototype.formatMoney2 = 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 = parseInt(n = Math.abs(+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.toMoney = function() {
  return '$' + this.toFixed(2);
};

Number.prototype.toMoney = 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 = parseInt(n = Math.abs(+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.toMoney = function (currency) {
    currency = currency ? currency : "$";
    if (currency === "0.00") {
        return "${0}".format(currency);
    return currency + "" + this.toFixed(2).replace(/(\d)(?=(\d{3})+\.)/g, "$1,");

Number.prototype.toMoney = function(decimals, decimal_sep, thousands_sep) {
   var n = this;
   var c = isNaN(decimals) ? 0 : Math.abs(decimals);
   var d = decimal_sep || '.';
   var t = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep;
   var sign = (n < 0) ? '-' : '';
   var i = parseInt(n = Math.abs(n).toFixed(c), 10) + '';
   var j = ((j = i.length) > 3) ? j % 3 : 0;
   return sign + (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) : '');
...