You're right of course. Not intentional. 0:3 picks out index 0, 1, 2. So 1:3 picks out the second and third element, which are indexed by 1 and 2 respectively

You're right of course. Not intentional. 0:3 picks out index 0, 1, 2. So 1:3 picks out the second and third element, which are indexed by 1 and 2 respectively. My guess is that what one prefers probably depends entirely on the data structures one works with most....