krzysztofczernek

function add (x, y) {
  return x + y
}

krzysztofczernek

function coin () {
  return Math.random() < 0.5 ? 'heads' : 'tails'
}

krzysztofczernek

let firstName = 'krzysztof'

function uppercaseName (lastName) {
  return `${firstName.toUpperCase()} ${lastName.toUpperCase()}`
}

krzysztofczernek

let user = {
  firstName: 'Krzysztof',
  age: '26'
}

function happyBirthday () {
  user.age = user.age + 1
}

krzysztofczernek

function calculatePrice (unitPrice, noOfUnits, couponValue = 0) {
  return unitPrice * noOfUnits - couponValue;
}

krzysztofczernek

function add (a, b) {
  return a + b
}

function multiply (a, b) {
  return a * b
}

const operations = { // here we're using add and multiply as regular values
  add,

krzysztofczernek

const numbers = [1, 1, 2, 3, 5, 8]
const transformFunction = x => x + 2

numbers.map(transformFunction)

krzysztofczernek

function makeGreeter (greeting) {
  return function greet (name) {
    return `${greeting}, ${name}!`
  }
}

// or, using the ES6 syntax:

const makeGreeter = greeting => name => `${greeting}, ${name}!`

krzysztofczernek

Keybase proof

I hereby claim:

• I am krzysztofczernek on github.
• I am krzysztofczernek (https://keybase.io/krzysztofczernek) on keybase.
• I have a public key ASA_TRe8xNa-Eb1U6fVmtpeWv4-gRBilIisFVUTfQAq9Lgo

To claim this, I am signing this object:

krzysztofczernek

let firstName = 'krzysztof'

function uppercaseName (lastName) {
  return `${firstName.toUpperCase()} ${lastName.toUpperCase()}`
}

console.log(uppercaseName('doe')) // Prints "KRZYSZTOF DOE"

// Lots and lots of code...