Class Lib

Class_lib

var Class = function(parent){  
    var klass = function(){
        this.init.apply(this, arguments);
    };
    
    // Change klass' prototype 
    if (parent) {
    var subclass = function() { };
        subclass.prototype = parent.prototype;
        klass.prototype = new subclass;
    };

    klass.prototype.init = function(){};

    klass.fn = klass.prototype;

    // Adding a proxy function
    klass.proxy = function(func){
        var self = this;
        return(function(){ 
            return func.apply(self, arguments); 
        });
    }

    // extend: static method 
    klass.extend = function(obj){
        var extended = obj.extended;
        for(var i in obj){
            klass[i] = obj[i];
        }
        if (extended) extended(klass)
    }
    // include: instance method
    klass.include = function(obj){
        // ...
        for(var i in obj){
            klass.prototype[i] = obj[i]
        }
        ///...
    }

    // Add the function on instances too
    klass.fn.proxy = klass.proxy;
    return klass;
};

// inheritance
var Animal = new Class;

Animal.include({
    breath: function() {
        console.log('whew!');
    }
});

var Cat = new Animal;

var tom = new Cat;

tom instanceof Cat // true
tom instanceof Animal // true
tom.breath();