Answers for "destructuring in javascript es6"

Array destructuring JS

// In an array destructuring from an array of length N specified on the right-hand side of the assignment, if the number of variables specified on the left-hand side of the assignment is greater than N, only the first N variables are assigned values. The values of the remaining variables will be undefined.

const foo = ['one', 'two'];

const [red, yellow, green, blue] = foo;
console.log(red); // "one"
console.log(yellow); // "two"
console.log(green); // undefined
console.log(blue);  //undefined

destructuring assignment in javascript

// destructuring assignment in javascript
// object destructuring
let person = { 
    name: "Chetan", 
    age: 30, 
    country: "India" 
};
const { name, age } = person;

console.log(name);
//expected output: "Chetan"

console.log(age);
//expected output: 30

console.log(country);
//expected output: Uncaught ReferenceError: country is not defined

// Array destructuring
const num = [1,2,3];
const [one, two, three] = num;
console.log(one); // 1
console.log(two); // 2
console.log(three); // 3