Nodejs String Hash hashCode()

Method Source Code

'use strict';/*from   w  w w.j a v  a 2 s.c  o m*/

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;
    hash = hash & hash;
  }
  return hash;
};

exports.uniqueName = function (file, next) {
  var tmpPath = file.path;
  tmpPath = tmpPath.substring(tmpPath.lastIndexOf('/') + 1, tmpPath.length);
  var fileName = file.name;
  var extension = fileName.substring(fileName.lastIndexOf('.') + 1, fileName.length);
  var hashCode = fileName.hashCode();
  var time = new Date().getTime();

  next(null, (hashCode < 0 ? -hashCode : hashCode) + tmpPath + time + '.' + extension);
};

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()

   'use strict';
   class HashTable {
       constructor() {
           this._elemets = [];
       add(key, value) {
           if (key == '' || value == '') return false;
           this._elemets[key.hashCode()] = value;
           return true;
   ...
   

3. 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;
   ...
   

4. hashCode()

   shuffle = function(o) {
       for ( var j, x, i = o.length; i; j = parseInt(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x)
           ;
       return o;
   };
   String.prototype.hashCode = function(){
       var hash = 5381;
       for (i = 0; i < this.length; i++) {
           char = this.charCodeAt(i);
   ...
   

5. 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;
   

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

9. 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);
   ...