(1..5).to_a

list(range(10))
# [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
list(range(1, 10))
# [1, 2, 3, 4, 5, 6, 7, 8, 9]

Array.from({ length: 5 }, (v, i) => i);
// [0, 1, 2, 3, 4]