Nodejs String Hash hashCode()

Method Source Code

// hash function for strings
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);//from  w  w w.j  av a 2 s .  co  m
    hash  = ((hash << 5) - hash) + chr;
    hash |= 0; // Convert to 32bit integer
  }
  return hash;
};

Related

1. hashCode()

   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;
   ...
   

2. hashCode()

   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;
   ...
   

3. hashCode()

   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;
   ...
   

4. hashCode()

   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);
   ...
   

5. hashCode()

   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;
   ...
   

6. hashCode()

   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 >>> 0);
   ...
   

7. hashCode()

   "use strict";
   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;
   };
   

8. hashCode()

   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;
   ...
   

9. hashCode()

   "use strict";
   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);
   ...