Nodejs Utililty Methods String Trimming Right

String.prototype.rTrim = function()
    return this.replace(/([\\s]*$)/g, "");

String.prototype.rTrim = function(){
  str = this;
  var i;
    for(i=str.length-1;i>=0;i--)
        if(str.charAt(i)!=" "&&str.charAt(i)!=" ")break;
    str=str.substring(0,i+1);
    return str;
...

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

String.prototype.rTrim = function () {
  var $whitespace = new String(" \t\n\r");
  if ($whitespace.indexOf(this.charAt(this.length - 1)) != -1) {
    var $i = this.length - 1;
    while ($i >= 0 && $whitespace.indexOf(this.charAt($i)) != -1) {
      $i--;
    return this.substring(0, $i + 1);
  return new String(this);
};
String.prototype.trim = function () {
  return this.lTrim().rTrim();
};

String.prototype.rTrim = function(charlist) {
  if (charlist === undefined)
    charlist = "\s";
  return this.replace(new RegExp("[" + charlist + "]+$"), "");
};

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

String.prototype.rtrim = function() {
    return this.replace(/\s+$/ig, "");
String.prototype.ltrim = function() {
  return this.replace(/^\s+/ig, "");

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

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

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