Cyclic Iterator (with ES6 Generators) and .take()

cyclic.js

/*
  Say I need to iterate over [1, 2, 3], yielding a value
  at a time but once I reach the final value, I want to
  keep receiving the values over and over again, making
  it a repeated sequence: 1, 2, 3, 1, 2, 3, 1 and so on...
*/
const cyclic = list => (function* () {
  while (true) for (let item of list) yield item
}())

let cycled = cyclic([1, 2, 3])
console.log(cycled.next().value)
//> 1

/*
  Also, say I want to, from that cyclic iterator, take
  a defined amount of values and put them inside an array.
  So if have [1, 2, 3] and the next value is 2 (which
  the iterator has not yielded yet) and I want to take
  4 numbers away, I'll get in return [2, 3, 1, 2]
*/

const take = (cyclic, howMany, taken = []) => {
  return howMany?
    take(cyclic, howMany - 1, taken.concat(cyclic.next().value)) :
    taken
}

console.log(take(cycled, 4))
//> [2, 3, 1, 2]

Great example!