Nodejs String Hash hashCode()

Method Source Code

// The function for hash code
String.prototype.hashCode = function()
{
   var hash = 0;/*  w ww  .  j  a v a 2s  . c o  m*/
   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; // Convert to 32bit integer
   }
   return hash & 0x00FFFFFF;
}

Related

1. 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;
   };
   

2. 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;
   ...
   

3. 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);
   ...
   

4. hashCode()

   String.prototype.hashCode = function(){
       var hash = 0, i, char;
       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;
   ...
   

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;
     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;
   ...
   

7. 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;
   ...
   

8. hashCode()

   String.prototype.hashCode = function(){
     var hash = 0;
     if (this.length === 0) return hash;
     for (i = 0; i < this.length; i++) {
       chr = (this.charCodeAt(i) * 2.2); 
       hash = ((hash<<32)-hash)+chr; 
       hash = hash & hash; 
     return hash;
   ...
   

9. 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;
   ...