// About objects.

var rabbit = {};

rabbit.speak = function(line) {

console.log("The rabbit says '" + line + "'");

};

rabbit.speak("I'm alive.");

// Special variable this.

function speak(line) {

console.log("The " + this.type + " rabbit says '" + line + "'");

}

var whiteRabbit = {type: "white", speak: speak};

var fatRabbit = {type: "fat", speak: speak};

whiteRabbit.speak("Oh my ears and whiskers, how late it's getting!");

fatRabbit.speak("I could sure use a carrot right now.");

speak.apply(fatRabbit, ["Burp!"]);

speak.call({type: "old"}, "私は日本語を話すことができます。");

var empty = {};

console.log(empty.toString);

console.log(empty.toString());

// Creating an object with specific prototype.

var protoRabbit = {

speak: function(line) {

console.log("The " + this.type + " rabbit says '" + line + "'");

}

};

var killerRabbit = Object.create(protoRabbit);

killerRabbit.type = "killer";

killerRabbit.speak("SKREEEE!");

// Object constructor.

function Rabbit(type) {

this.type = type;

}

var killerRabbit = new Rabbit("killer");

var blackRabbit = new Rabbit("black");

console.log(blackRabbit.type);

Rabbit.prototype.speak = function(line) {

console.log("The " + this.type + " rabbit says '" + line + "'");

};

blackRabbit.speak("Doom...");

// Overriding an object's derived properties.

Rabbit.prototype.teeth = "small";

console.log(killerRabbit.teeth);

killerRabbit.teeth = "long, sharp, and bloody";

console.log(killerRabbit.teeth);

console.log([1, 2].toString());

console.log(([1, 2].toString()).length);