Nodejs Utililty Methods String Padding

String.prototype.pad = function(length, character, direction) {
  var self = this;
  var STR_PAD_LEFT = 1;
  var STR_PAD_RIGHT = 2;
  var STR_PAD_BOTH = 3;
    if (typeof(length) == "undefined") { var length = 0; }
    if (typeof(character) == "undefined") { var character = ' '; }
    if (typeof(direction) == "undefined") { var direction = STR_PAD_RIGHT; }
    if (length + 1 >= self.length) {
...

String.prototype.pad = Number.prototype.pad = function(n, char)
  char = (typeof char !== 'undefined') ? char : 0;
  for ( var i=0,nstr = ''; (n-(this.toString()).length) > i; ++i)
    nstr += char;
  return nstr + this;
};

String.prototype.pad = function (n,left, str) {
  var string = String(this).substr(0,n);
  var empty = Array(n-string.length+1).join(str||' ');
  return left ? empty + this : this + empty;

String.prototype.pad = function (number, padChar) {
    var toAddCount = Math.max(0, number - this.length + 1);
    padChar = padChar || '0';
    return new Array(toAddCount).join(padChar) + this;
};

String.prototype.pad = function(side, ch, maxLength) {
  var padding = "";
  for(var i = this.length; i < maxLength; i++) {
    padding += ch;
  return (side === "left") ? (padding + this) : (this + padding);
};

var pad = function (str, max) {
  str = str.toString();
  return str.length < max ? pad("0" + str, max) : str;

String.prototype.pad = function (width, z) {
    var n = this.substr(0);
    z = z || '0';
    var newval = n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
    return newval;
};

String.prototype.padding = function (val, len) {
   var s = "";
   for (var i=0;i<len;i++)
      s+=val;
   return s;
};