// JavaScript Document
//Copyright © Rick Measham, 2006. All rights reserved.
//This library is free software; you can redistribute it and/or modify it under the GPL or under the same terms as Perl at your discresion.


function Hash(){
	for( var i=0; i < arguments.length; i++ )
			for( n in arguments[i] )
				if( arguments[i].hasOwnProperty(n) )
					this[n] = arguments[i][n];
}
	
// Hash.version = 1.00;	// Original version
// Hash.version = 1.01;	// Added ability to initialize in the constructor
// Hash.version = 1.02;	// Fixed document bug that showed a non-working example (thanks mareks)
//Hash.version = 1.03;	// Removed returning this from the constructor (thanks em-dash)
Hash.version = 1.04;	// Missed some 'var' declarations (thanks Twey)


Hash.prototype = new Object();

Hash.prototype.keys = function(){
	var rv = [];
	for( var n in this )
		if( this.hasOwnProperty(n) )
			rv.push(n);
	return rv;
}

Hash.prototype.length = function(){
	return this.keys().length();
}

Hash.prototype.values = function(){
	var rv = [];
	for( var n in this )
		if( this.hasOwnProperty(n) )
			rv.push(this[n]);
	return rv;
}

Hash.prototype.slice = function(){
	var rv = [];
	for( var i = 0; i < arguments.length; i++ )
		rv.push(
			( this.hasOwnProperty( arguments[i] ) )
				? this[arguments[i]]
				: undefined
		);
	return rv;
}

Hash.prototype.concat = function(){
	for( var i = 0; i < arguments.length; i++ )
		for( var n in arguments[i] )
			if( arguments[i].hasOwnProperty(n) )
				this[n] = arguments[i][n];
	return this;
}