val isEven: (Int) -> Boolean = { i: Int -> i % 2 == 0 }

val isOdd: (Int) -> Boolean = { it % 2 == 1 }

fun filterIt1Long(i: Int, func: (Int) -> Boolean): List<Int> =
  buildList {
    for (v in (0..i)) {   // (0..i) is inclusive
      if (func.invoke(v))
        add(v)
    }
  }

fun filterIt1Short(i: Int, func: (Int) -> Boolean): List<Int> = (0..i).filter(func)