Nodejs Utililty Methods String Hash

String.prototype.hashCode = function(){
  var hash = 0;
  for (var i = 0; i < this.length; i++) {
    var code = this.charCodeAt(i);
    hash = ((hash<<5)-hash)+code;
    hash = hash & hash; 
  return hash;

String.prototype.hashCode = function () {
    var h = 0, i = 0, l = this.length;
    if (l === 0) return h;
    for (; i < l; i++) {
        h = ((h << 5) - h) + this.charCodeAt(i);
        h |= 0; 
    return h;
};
...

String.prototype.hashCode = function(){
  var hash = 0;
  if (this.length == 0) return hash;
  for (i = 0; i < this.length; i++) {
    char = this.charCodeAt(i);
    hash = ((hash<<5)-hash)+char;
    hash = hash & hash; 
  return hash;
...

String.prototype.hashCode = function(){
  var hash = 0;
  if (this.length == 0) return hash;
  for (i = 0; i < this.length; i++) {
    char = this.charCodeAt(i);
    hash = ((hash<<5)-hash)+char;
    hash = hash & hash;
  return hash;
...

String.prototype.hashCode = function(){
  var hash = 0;
  if (this.length == 0) return hash;
  for (let i = 0; i < this.length; i++) {
    let char = this.charCodeAt(i);
    hash = ((hash<<5)-hash)+char;
    hash = hash & hash; 
  return hash;
...

String.prototype.hashCode = function() {
  var hash = 0, i, chr;
  if (this.length === 0) return hash;
  for (i = 0; i < this.length; i++) {
    chr   = this.charCodeAt(i);
    hash  = ((hash << 5) - hash) + chr;
    hash |= 0; 
  return hash;
...

String.prototype.hashCode = function(){
  var hash = 0, i, char;
  if (this.length == 0) return hash;
  for (i = 0, l = this.length; i < l; i++) {
    char  = this.charCodeAt(i);
    hash  = ((hash<<5)-hash)+char;
    hash |= 0; 
  return hash;
...

String.prototype.hashCode = function() {
    var hash = 0;
    if(this.length == 0) return hash;
    for(var i = 0; i < this.length; i++) {
        var char = this.charCodeAt(i);
        hash = (( hash << 5 ) - hash) + char;
        hash = hash & hash;
    return hash;
...

String.prototype.hashCode = function(){
   var hash = 0;
   if (this.length == 0) return hash;
   for (i = 0; i < this.length; i++) {
      char = this.charCodeAt(i);
      hash = ((hash<<5)-hash)+char;
      hash = hash & hash; 
   return Math.abs(hash);
...

String.prototype.hashCode = function() {
  var hash = 0, i, chr, len;
  if (this.length === 0) return hash;
  for (i = 0, len = this.length; i < len; i++) {
    chr   = this.charCodeAt(i);
    hash  = ((hash << 5) - hash) + chr;
    hash |= 0; 
  return hash;
...