fun.swift

func zip<X, Y, Z>(first: X[], second: Y[], transform: (X, Y) -> (Z)) -> Array<Z> {
  var zipped = Z[]()
  
  for i in 0..min(first.count, second.count) {
    zipped.append(transform(first[i], second[i]))
  }
  
  return zipped
}

func all<X>(array: X[], satisfy test: (X) -> Bool) -> Bool {
  for i in array {
    if !test(i) {
      return false
    }
  }
  return true
}

func any<X>(array: X[], satisfies test: (X) -> Bool) -> Bool {
  return !all(array, { (x: X) -> Bool in
    return !test(x)
  })
}