[
  filter(isEven, []),
  filter(isEven, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]),
  filter(isOdd, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]),
  sum(filter(isEven, mapN(function(i) { return i }, 50000))),
  sum(filter(isOdd, mapN(function(i) { return i }, 50000))),
  find(isEven, []) === undefined,
  find(isEven, [1, 3, 5, 7, 9, 2, 4]),
  remove(10, mapN(idF, 11))
]