subu8array(a, start, end)
subs8array(a, start, end)
subu16array(a, start, end)
subs16array(a, start, end)
subu32array(a, start, end)
subs32array(a, start, end)
subu64array(a, start, end)
subs64array(a, start, end)
Return a new integer array with all the elements of a from the index start (inclusive)
to end (exclusive).
subu8array(#u8[1, 2, 3, 4, 5], 2, 4)
// #u8[3, 4]