I find that in practice the amount of +-1 is about the same for zero-based and one-based indexing. Each has situations it is better suited for. For example, iterating a list backwards is nicer with one-based indexes.
I think it's inclusive indexing in general that make reverse iteration nice, not necessarily whether it's based on 1 or 0. (Namely, an ergonomic way to access the index of the last element as opposed to the length of the list. With inclusive indexing, the length is already naturally the index of the last element.)
I think it's inclusive indexing in general that make reverse iteration nice, not necessarily whether it's based on 1 or 0. (Namely, an ergonomic way to access the index of the last element as opposed to the length of the list. With inclusive indexing, the length is already naturally the index of the last element.)