Others

Deconstructing

NOTE how for Objects we use const {} and for arrays const []

const doggie = {
  first: 'Buzz',
  breed: 'Great Pyrenees',
  fur_color: 'black and white',
  activity_level: 'sloth-like',
  favorite_food: 'hot_dogs'
};
 
const { first, breed } = doggie;

and with arrays:

const dogs = ['Great Pyrenees', 'Pug', 'Bull Mastiff']

const [medium, small, giant] = dogs
console.log(medium, small, giant) // Great Pyrenees, Pug, Bull Mastiff

const [, small, giant] = dogs
console.log(small, giant) //  Pug, Bull Mastiff

rest and spread

function muppetLab(a, b, ...muppets) {
  console.log(a, ' ', b); // Dr. Bunson Beaker

  console.log(muppets); // ["Miss Piggy", "Kermit", "Animal"]
  console.log(muppets[0]); // Miss Piggy
  console.log(muppets.length); // 3
}

muppetLab("Dr. Bunson", "Beaker", "Miss Piggy", "Kermit", "Animal")