OO Javascript Cheat Sheet (DRAFT) by theese

// "Class"
function Point(){
    this.X = 0;
    this.Y = 0;
}

// Define getter
Object.__defineGetter__.call(Point.prototype, "getCoords", function(){
    return this.X + ", " + this.Y;
});

// Define setter
Object.__defineSetter__.call(Point.prototype, "setCoords", function(coords){
    var part = coords.toString().split(", ");
    this.X = part[0] || "";
    this.Y = part[1] || "";
});

// Usage
var testPoint = new Point();
testPoint.setCoords = "10, 20";
document.write(testPoint.getCoords);

function Animal(){
    this.name = "Animal";
    this.toString = function(){
        return "This is " + this.name;
    };
}

function Canine(){
    this.name = "Canine";
}

function Wolf(){
    this.name = "Wolf";
}

// Inheriting
Canine.prototype = new Animal();
Wolf.prototype = new Canine();

// There is need to re-reference constructors
Canine.prototype.constructor = Canine;
Wolf.prototype.constructor = Wolf;

// Function for quick inheriting
function extend(child, parent){
    var temp = function(){};

    temp.prototype = parent.prototype;
    child.prototype = new temp();
    child.prototype.constructor = child;
}

function Point(){
    this.X = 0;
    this.Y = 0;
}

Object.defineProperty(Point.prototype, 'pointPos', {
    get: function(){
        return "X: " + this.X + " Y: " + this.Y;
    }
    set: function(point){
        var parts = point.toString().split(", ");
        this.X = parts[0] || "";
        this.Y = parts[1] || "";
    }
});

// Usage
var testPoint = new Point();
testPoint.pointPos = "10, 20";
document.write(testPoint.pointPos);

function Circle(radius){
    this._radius = radius;
}

// Define prototype
Circle.prototype = {
    set radius(radius){ this._radius = radius; }
    get radius(){ return this._radius; }
    get area(){ return Math.PI * Math.pow(this._radius, 2); }
};

// Usage
var circle = new Circle(10);
circle.radius = 5;
document.write(circle.area);

// Usage

// Call parent method
Wolf.prototype.height = function(){
    var height = Canide.prototype.height.apply(this);
    return height * 1.2;
};