Destructuring.js

// unpacking object array
const actor={
    name:'Ananta',
    age:30,
    phone:123456,
    money:100000
}
// we can get the items with the actual name in this way
// use property name as a variable that contains the property
const {age}=actor;
console.log(age);
const {phone,money}=actor;
console.log(phone,money);

// array destructuring
const numbers=[1,2,3,4];
const [first,second]=numbers;
console.log(first,second);

const [x,y]=[1,2];
console.log(x,y);

// if its an array u have to destructure them using the same object array

const double=(x,y)=>[x*2,y*2];
const [c,d]=double(2,3);

let [num1,,,num2]=[1,2,3,4];
console.log(num1,num2);

const key=Object.keys(actor);
console.log(key);

const values=Object.entries(actor);
console.log(values);
// delete object
delete actor.age;
console.log(actor);
// take all the other elements except name
const {name,...rest}=actor;
console.log(rest);
// stop the update 
Object.freeze(actor);
actor.wife='Sharddha';
console.log(actor);