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// const sayHello = function(){
//   console.log('Hello');
// }

// const sayHello = () => {
//   console.log('Hello');
// }

//One line function does not need braces
// const sayHello = () => console.log('Hello');

//One line returns
// const sayHello = () => 'Hello';

//Same as above
// const sayHello = function(){
//   return 'Hello';
// }

//Return object
// const sayHello = () => ({msg: 'Hello'});

//Single parameter does not need parenthesis 
// const sayHello = name => console.log(`Hello ${name}`);

//Multiple parameters need parenthesis
// const sayHello = (firstName, lastName) => console.log(`Hello ${firstName} ${lastName}`);

// sayHello('Brad', 'Traversy');

const users = ['Nathan', 'John', 'William'];

// const nameLengths = users.map(function(name){
//   return name.length;
// });

//Shorter
// const nameLengths = users.map((name) => {
//   return name.length;
// });

//Shortest
const nameLengths = users.map(name => name.length);

console.log(nameLengths);