JavaScript prototype chain thought

proto

function getProperty (obj, prop) {
    if (obj.hasOwnProperty(prop)) {
        return obj[prop];
    }

    if (obj.__proto__ !== null) {
        return getProperty(obj.__proto__, prop);
    }

    return undefined;
}

var sayTwo = {
    you: 'you',
    me: 'me',
    print: function () {
        console.log(this.you + this.me);
    }
};

var p = {
    you: 'beep',
    me: 'boop',
    '__proto__': sayTwo
};

p.print();

var say = function (word) {
    this.word = word;
    this.name = "David Zhang";
}

var say1 = new say('beep');
var say2 = new say('boop');

say1.name = 'Jeff';
console.log(say2.name);

Object.create = function (parent) {
    function F () {}
    F.prototype = parent;
    return new F();
}

var s = Object.create(sayTwo);
s.print();

var P = new function () {}
console.log(P.prototype);
P.prototype.name = "beep";
var a = new P;
console.log(a.name);
console.log(a.__proto__ === P.prototype);
a.__proto__.name = "boop";
console.log(P.prototype.name);