Nodejs String Hash hashCode()

Method Source Code

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;//from   ww w  .  j  a  v  a 2s. c  o m
    }

    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;
   ...
   

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;
     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;
   ...
   

4. 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;
   ...
   

5. 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;
   ...
   

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 Math.abs(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, 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, 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);
   ...