nested hashtables in javascript

Do the classes as follows.

function HashTable() {
 var content = {};
 var count = 0;
 this.Add = function(key, value) {
 if (content.hasOwnProperty(key)) throw new Error("Key already exist");
 content[key] = value;
 count++;
 };
 this.Set = function(key, value) {
 if (!content.hasOwnProperty(key)) count++;
 content[key] = value;
 };
 this.Get = function(key) {
 if (!content.hasOwnProperty(key)) throw new Error("No such key");
 return content[key];
 };
 this.AllKeys = function() {
 var keys = [];
 for (a in content) {
 keys.push(a);
 }
 return keys;
 };
 this.Count = function() {
 return count;
 };
 this.Remove = function(key) {
 if (!content.hasOwnProperty(key)) throw new Error("No such key");
 delete content[key];
 count--;
 };
}
// Then you can use it as follows
var folders = new HashTable();
folders.Add(1, 10);
alert(folders.Count());
alert(folders.Get(1));
folders.Remove(1);
alert(folders.Count());

It gives you a more rigid and OOP approach.

Edit

This ensures that your keys are unique, gives you count at any time and accepts integers and strings as keys.

You can just write it out:

var folders = {
 'folder1-guid': [
 {'file1-guid': 'file1-content'},
 {'file2-guid': 'file1-content'}
 ]
};

Alternatively, create Object and Array instances and assign the properties to them.

• javascript
• jquery
• data-structures
• hash
• dictionary