Nodejs String Hash hashCode()

Method Source Code

/***//from w  w  w. jav  a2 s .com
 * roundNumber()
 *  A simple function to round a decimal to a specified
 *  number of decimal places.
 *
 *  Arguments: number to round, number of decimal places
 *  Returns: a float
 ****/
function roundNumber(number, decimals) {
    var newnumber = new Number(number+'').toFixed(parseInt(decimals));
    return parseFloat(newnumber);
};

/***
 * hashCode()
 *  A simple function to determine a quick hash of a string.
 *
 *  Returns: a 32 bit integer
 ****/
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; // Convert to 32bit integer
    }
    return hash;
};

Related

1. hashCode()

   var host = 'https:
   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;
   getRequest = function(url, callback) {
     var req = new XMLHttpRequest();
     req.open("GET", url, true);
     if (callback != null) {
       req.onload = callback;
     return req;
   postRequest = function(url, callback) {
     var req = new XMLHttpRequest();
     req.open("POST", url, true);
     if (callback != null) {
       req.onload = callback;
     return req;
   

2. hashCode()

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

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);
       hash  = ((hash << 5) - hash) + chr;
       hash |= 0; 
     return hash;
   ...
   

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

6. 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;
   ...
   

7. hashCode()

   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;
   ...
   

8. 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;
   ...
   

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 |= 0 
       return hash
   ...