SOURCE

function Otaku(name, age) {
    this.name = name
    this.age = age
    this.habit = 'Games'

    return 'Otaku Factory'
}

var person = new Otaku('Kevin', 18)

console.log(person.name)  // 'Kevin'
console.log(person.age)  // 18
console.log(person.habit) // 'Games'

// Otaku.prototype.strength = 60

// Otaku.prototype.sayYourName = function() {
//     console.log('I am' + this.name)
// }

// var person = objectFactory(Otaku, 'Kevin', 18)

// console.log(person.name)  // 'Kevin'
// console.log(person.age)  // 18
// console.log(person.habit) // 'Games'

// person.sayYourName() // I am Kevin

function objectFactory() {
    var obj = new Object()
    var Constructor = [].shift.call(arguments)
    if(typeof Constructor !== 'function') {
        throw new Error('first argument must be a factory function')
    }
    obj.__proto__ = Constructor.prototype
    var ret = Constructor.apply(obj, arguments)
    return typeof ret === 'object' ? ret : obj
}