What does this Ruby snippet output?

Console output

Why

`Integer#digits` decomposes a number into its digit array from least significant to most significant. In base 10, `1234` gives `[4, 3, 2, 1]`. In base 16, `1234 = 0x4D2`, giving `[2, 13, 4]` (where `13` is `D`). `0` gives `[0]`.