// Javascript Arrow Functions

​

// 1+ parameters

const add = function(x, y) {

  return x + y

}

console.log(add(4, 5))

​

const addES6 = (x, y) => x + y

console.log(addES6(5,6))

​

​

// 1 parameter

const hello = function(name) {

  return `Hello ${name}`

}

console.log(hello('Diallo'))

​

const helloES6 = name => `Hello ${name}`

console.log(helloES6('Niang'))

​

​

// 0 parameter

const helloWorld = function() {

  return 'Hello World!'

}

console.log(helloWorld()) // Hello World!

​

const helloWorldES6 = () => 'Hello ES6 World!'

console.log(helloWorldES6()) // Hello ES6 World!

​

​

// Object literal

const setContent = function(title, content) {

  return {

    title: title,

    content: content

  }

}

console.log(setContent('Hello', 'World!'))

​

const setContentES6 = (title, content) => ({title: title, content: content})

console.log(setContentES6('Hello', 'ES6'))

​

​

// Use case, filter an array

const prices = [4, 5, 14, 20, 45, 3, 8, 15]

​

var greaterThan10 = prices.filter(function(p) {

  return p >= 10

})

console.log(greaterThan10)

​

const greaterThan10ES6 = prices.filter(p => p >= 10)

console.log(greaterThan10ES6)

​

​

// What about `this`

const user = {

  firstName: 'Adama',

  lastName: 'Niang',

  old: 25,

  presentation: () => `Hi, I'm ${this.firstName} ${this.lastName} and I'm ${this.old} years old.`

}

console.log(user.presentation())

​

const user1 = {

  firstName: 'Adama',

  lastName: 'Niang',

  old: 25,

  presentation: function() {

    return `Hi, I'm ${this.firstName} ${this.lastName} and I'm ${this.old} years old.`

  }

}

console.log(user.presentation())