Nodejs Utililty Methods String Trimming Right

String.prototype.rtrim = function() {
  return this.replace(/(\s*$)/g, "");

String.prototype.rtrim = function() {
  return this.replace(/\s+$/,'');

String.prototype.rtrim = function()
  return this.replace( /\s*$/g, '' ) ;

String.prototype.rtrim = function(){
    var res = this;
    while (res.substring(res.length - 1, res.length) == " ") {
        res = res.substring(0, res.length - 1);
    return res;

String.prototype.rtrim=function()
  {return this.replace(/\s+$/,'');}

String.prototype.rtrim = function(ch) {
    var r = new RegExp("{0}+$".format(ch || "\\s"))
    return this.replace(r, "");
};

String.prototype.rtrim = function (charlist) {
  charlist = !charlist ? ' \\s\u00A0' : (charlist + '').replace(/([\[\]\(\)\.\?\/\*\{\}\+\$\^\:])/g, '$1');
  var re = new RegExp('^[' + charlist + ']+', 'g');
  return this.replace(re, '');
};

String.prototype.trimEnd = function() {
  for (var i=this.length-1; this.charAt(i) ==' '; i--) {
    this.substring(0, i);
  return this;
};

String.prototype.trimEnd=function(c)
    c = c?c:' ';
    var i=this.length-1;
    for(;i>=0 && this.charAt(i)==c;i--);
    return this.substring(0,i+1);
var Utils = {
    getValues : function(dataSet)
...

String.prototype.trimEnd=function(c)
    c = c?c:' ';
    var i=this.length-1;
    for(;i>=0 && this.charAt(i)==c;i--);
    return this.substring(0,i+1);