Objecst

// defined by {} , can take in properties

let example1 = {
    firstName: 'Dylan', // firstName is key, 'Dylan' is value
    lastName: 'Israel',
    address: {
        city: 'Austin',
        state: 'Texas'
    },
    age: 30,
    cats: ['Milo', 'Tito', 'Achieles']
};

console.log(example1.firstName); // produce first name
console.log(example1.address.city);

example.age (example1.age);

// > 31

// if we want all the keys
console.log(Object.keys(example1));
// > ["firstName", "lastName", "address", "age", "cats"]

// if we want values as well
console.log(Object.values(example1));
// > ["Dylan", "Israel", {city: "Austin", state: "Texas"}, 31, ["Milo", "Tito", "Achieles"]]

// if we want to ask for a certain key
console.log(example1.hasOwnProperty('firstName2'));
// > false as it does now exist.

// ===================================== CHALLENGE ============================================

let example1 = {
    firstName: 'Dylan'
};

let example2 = Object.assign({}, example1);

example2.lastName = 'Israel'; // instantiating a new object.

console.log(example1);
console.log(example2);