Destructuring objects

    It helps pull incoming objects apart.

    2.   city: "Costa Mesa",
    3.   state: "CA",
    4.   zip: 92444
    5. let {city: c, state: s, zip: z} = address;
    7. log(c, s, z); // 'Costa Mesa CA 92444'

    Simpler way

    You can also use it like 

    1. var person = {name: 'Aaron', age: 35};
    2. displayPerson(person);
    4. function displayPerson({name = "No Name provided", age = 0}) {
    5.   // do something with name and age to display them
    6. }

    Irrefutable pattern

    The destructuring must match the object or else it will throw an error.

    1. let {a: x} = {}   // throw
    2. let ?{a: x} = {}  // x = undefined
    3. let {?a: x} = {}  // x = undefined
    4. let {?a: x} = 0   // throw

    Patterns w/ Default Values

    1. let person = {
    3.   age: "35",
    4.   address: {
    5.     city: "Salt Lake City",
    6.     state: "UT",
    7.     zip: 84115
    8.   }
    9. };
    10. let {name, age, address: {city, state, zip}} = person; // this won't create address, but will create city, state, zip