My new NEW

function Person(saying) {
    this.saying = saying;
}

Person.prototype.talk = function () {
    console.log(`It's 5 AM so:  ${this.saying}`);
};

function myNew(constructor) {
    // 1. create a new object;
    let obj = {};

    // 2. set the prototype
    Object.setPrototypeOf(obj, constructor.prototype);

    // 3. execute the constructor with this... take the args after 0
    constructor.apply(obj, Array.from(arguments).slice(1));

    // 4. return the object
    return obj;
}

let me = new Person('bla bla bla');
me.talk();

let testPerson = myNew(Person, 'go to gym');
testPerson.talk();