Nodejs String Hash hashCode()

Method Source Code

String.prototype.hashCode = function() {
  for(var ret = 0, i = 0, len = this.length; i < len; i++) {
    ret = (31 * ret + this.charCodeAt(i)) << 0;
  }//from   w  w w  . j av  a 2s.  c  o m
  return ret;
};

Related

1. getHashCode()

   String.prototype.getHashCode = 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;
   ...
   

2. getHashCode(caseSensitive)

   String.prototype.getHashCode = function (caseSensitive) {
       var str = this;
       if (!caseSensitive) {
           str = str.toLowerCase();
       var hash = 1315423911, i, ch;
       for (i = str.length - 1; i >= 0; i--) {
           ch = str.charCodeAt(i);
           hash ^= ((hash << 5) + ch + (hash >> 2));
   ...
   

3. hash()

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

4. hash()

   String.prototype.hash = function () {
     var hash = 5381;
     for (var i = 0; i < this.length; i++) {
       var char = this.charCodeAt(i);
       hash = ((hash << 5) + hash) + char;
     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() {
     for(var ret = 0, i = 0, len = this.length; i < len; i++) {
       ret = (31 * ret + this.charCodeAt(i)) << 0;
     return Math.abs(ret);
   };
   

7. hashCode()

   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;
   

8. hashCode()

   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;
   };
   ...
   

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;
   ...