# Built-in

Filtered([1 .. 100], IsPrime);
# [ 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 ]

Filtered([1 .. 10], IsEvenInt);
# [ 2, 4, 6, 8, 10 ]

Filtered([1 .. 10], IsOddInt);
# [ 1, 3, 5, 7, 9 ]
