Nodejs String Hash hashCode()

Method Source Code

/*/*from   w w w  .  jav a 2 s . c om*/
 * http://stackoverflow.com/questions/7616461/generate-a-hash-from-string-in-javascript-jquery
 */
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; // Convert to 32bit integer
  }
  return hash;
};

Related

1. 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 hash.toString();
   ...
   

2. 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 Math.abs(hash); 
   ...
   

3. hashCode()

   var crypto = require('crypto');
   function hashString(str) {
     return crypto.createHash('md5').update(str || '').digest('hex');
   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);
   ...
   

4. 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;
   ...
   

5. hashCode()

   String.prototype.hashCode = function(){
       var hash = 0;
       if (this.length === 0) return hash;
       if (Array.prototype.reduce){
         hash = this.split("").reduce(function(a,b){a=((a<<5)-a)+b.charCodeAt(0);return a&a},0); 
       else 
       for (var i = 0; i < this.length; i++) {
           hash  = ((hash<<5)-hash) + this.charCodeAt(i);
   ...
   

6. 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;
   ...
   

7. hashCode()

   function guid() {
     function s4() {
       return Math.floor((1 + Math.random()) * 0x10000)
         .toString(16)
         .substring(1);
     return s4() + s4();
   function htmlEncode(s) {
   ...
   

8. 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;
   ...
   

9. hashCode()

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