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let sampleArr = [1, 2, 3, 4, 5];
let [x, y] = sampleArr; 
[y, x] = [x, y];
let subArr;
[x, y, ...subArr] = sampleArr;
console.log(subArr); //[3, 4, 5];

raunaqsachdev

var sampleArr = [1, 2, 3, 4, 5];
var x = sampleArr[0],
    y = sampleArr[1];
var temp = [x, y];
y = temp[0];
x = temp[1];

var subArr;
x = sampleArr[0];
y = sampleArr[1];

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function addThreeNumbers(a, b, c) {
  return a + b + c;
}

let sampleArr = [1, 2, 3];
console.log(addThreeNumbers(...sampleArr)); //6 

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const sampleArr = [1, 9, 17, -3, 7, 89, 40, 100, 121, 8];
const maxValue = Math.max(...sampleArr);
const minValue = Math.min(...sampleArr);
console.log(maxValue); //121
console.log(minValue); //-3

raunaqsachdev

let [x,y,z] = 'a\uD83D\uDCA9c'; // x='a'; y='\uD83D\uDCA9'; z='c'
let [p, q] = new Set(['new', 'string']); // p='new'; q='string’;

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let sampleObj = {
  firstName: 'John',
  lastName: 'Doe',
  age: 29,
  gender: 'male'
};

let { name, firstName, lastName, gender:sex } = sampleObj;
//name = undefined, firstName = John, lastName = Doe, sex = male

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var sampleObj = {
  firstName: John,
  lastName: Doe,
  age: 29,
  gender: male
};

var name = sampleObj.name, //undefined
    firstName = sampleObj.firstName, //John
    lastName = sampleObj.lastName, //Doe

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function printName({firstName, lastName}) {
  console.log(`Name : ${firstName} ${lastName}`);
};

let personObj = {
  firstName: 'John',  
  lastName: 'Doe'
};

printName(personObj); //Name : John Doe

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let obj1 = {
  a: 1,
  b: 2, 
  c: 3
};

let obj2 = {
  p: 4,
  q: 5,
  r: 6

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switch(valueStore) {
  case A: {
    function 1();
    break;
  }
  case B: {
    function2();
    break;
  }
  default: {