ES6 Destructuring

Giriş
ES6 ile geliyor. Açıklaması şöyle.

Destructuring assignment should reside inside a function where a variable should be available:

Örnek
Şöyle yaparız.

function UpdateUserProps(user, updatedUser) {
    const { email, status } = updatedUser;
    user.email = email;
    user.status = status;
    return user;
}

Örnek
Şöyle yaparız.

function example(obj, ...rest) {
    let number, str;
    if (rest.length === 2) {
        [number, str] = rest; // This is called "destructuring assignment"
    } else {
        [str] = rest;
    }
    if (typeof number === "string") {
        // Caller provided a string, not anumber, as the second
        // argument; move things around
        str = number;
        number = undefined;
    }
    console.log("obj", obj);
    console.log("number", number);
    console.log("str", str);
}
console.log('Calling example({}, 42, "forty-two");');
example({}, 42, "forty-two");
console.log('Calling example({}, "no number given");');
example({}, "no number given");