Composition Example

composition.js

const barker = (state) => ({
  bark: () => console.log('Woof, I am ' + state.name)
})

const driver = (state) => ({
  drive: () => state.position = state.position + state.speed
})

barker({ name: 'karo'}).bark()
// Woof, I am karo


const murderRobotDog = (name) => {
  let state = {
    name,
    speed: 100,
    position: 0
  }

  return Object.assign(
    {},
    barker(state),
    driver(state),
    killer(state)
  )
}

murderRobotDog('sniffles').bark();
// 'Woof I am sniffles'