NyaGarcia

const pokemon = {
  experience: 0,
  fight: function() {
    console.log(this.experience);
    this.experience += Math.floor(Math.random() * 10) + 1;
  }
};

NyaGarcia

const pokemon = {
  experience: 0,
  fight: () => {
    this.experience += Math.floor(Math.random() * 10) + 1;
  }
};

pokemon.fight();
console.log(pokemon.experience);
// Output: 0

NyaGarcia

const logUser = ({ name, pass }) =>
  `Logging user ${name} with password: ${pass}`;

const user = { name: "Nya", pass: "secretpassw0rd" };

console.log(logUser(user));
// Output: Logging user Nya with password: secretpassw0rd

NyaGarcia

const choosePokemon = (
  firstPokemon = "Charmander",
  secondPokemon = "Bulbasaur"
) => `I choose ${firstPokemon} and ${secondPokemon}`;

// Calling function without parameters
console.log(choosePokemon());
// Output: I choose Charmander and Bulbasaur

NyaGarcia

function sayHello(name) {
  return `Hello ${name}!`;
}
console.log(sayHello.prototype);
// Output: {...}


const sayHelloArrow = name => `Hello ${name}`;
console.log(sayHelloArrow.prototype);
// Output: undefined

NyaGarcia

const choosePokemonArrow = (firstPokemon, secondPokemon) =>
  `I choose ${firstPokemon} and ${secondPokemon}!`;

console.log(choosePokemonArrow("Squirtle", "Bulbasaur"));

NyaGarcia

const sayHello = () => "Hello!";

console.log(sayHello());

NyaGarcia

function choosePokemon(firstPokemon, secondPokemon) {
  return `I choose ${firstPokemon} and ${secondPokemon}!`;
}

console.log(choosePokemon("Charmander", "Squirtle"));
// Output: I choose Charmander and Squirtle!

NyaGarcia

const User = () => {};

const user = new User();
// Output: Error: User is not a constructor

NyaGarcia

const choosePokemonArrow2 = pokemon => {
  console.log("Logging");
  return `I choose you ${pokemon}!`;
};

console.log(choosePokemonArrow2("Bulbasaur"));
/* Output:
    Logging
    I choose you Bulbasaur!
*/