Nodejs String Hash hashCode()

Method Source Code

/**//from w w  w  . j  a  va 2 s .c  o m
 * @license
 * Copyright 2012 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
String.prototype.hashCode = function() {
  var hash = 0;
  if ( this.length == 0 ) return hash;

  for (i = 0; i < this.length; i++) {
    var code = this.charCodeAt(i);
    hash = ((hash << 5) - hash) + code;
    hash &= hash;
  }

  return hash;
};

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, 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;
   ...
   

3. hashCode()

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

4. hashCode()

   function roundNumber(number, decimals) {
       var newnumber = new Number(number+'').toFixed(parseInt(decimals));
       return parseFloat(newnumber);
   };
   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);
   ...
   

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;
       if (this.length == 0) return hash
       for (i = 0; i < this.length; i++) {
           char = this.charCodeAt(i)
           hash = ((hash << 5) - hash) + char
           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;
       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;
   ...