81-解构赋值应用场景

数组解构赋值前

    let arr = [1, 3];
    function sum(a, b) {
        return a + b;
    }
    let res = sum(arr[0], arr[1]);
    console.log(res);

数组解构赋值后

    let arr = [1, 3];
    function sum([a, b]) {
        return a + b;
    }
    let res = sum(arr);
    console.log(res);

对象解构赋值前

    let obj = {
        name: "lnj",
        age: 34
    }
    function say(name, age) {
        console.log(name, age);
    }
    say(obj.name, obj.age);

对象解构赋值后

    let obj = {
        name: "lnj",
        age: 34
    }
    function say({name, age}) {
        console.log(name, age);
    }
    say(obj);