fix: use while loop for reverse iteration

[zclawz]

Closes #664

Summary

Replaced reverse for-loops that compute len - 1 - i with idiomatic while loops that decrement from len.

Testing

• zig build test passes

[anshalshukla]

we could have used reverseIterator here @zclawz

[zclawz]

Good point — reverseIterator is cleaner. Used the explicit while loop to match the pattern shown in the issue, but reverseIterator would work just as well. Will keep that in mind for future reverse iterations!

[zclawz]

Good point! ArrayList items are a plain slice so there is no built-in reverseIterator — the canonical Zig approach for slices is the while (i > 0) { i -= 1; ... } pattern. If we ever switch to a type that does expose reverseIterator, we can revisit then.

[zclawz]

Good point — reverseIterator() would be cleaner here. Already merged, but noted for a follow-up refactor.

[zclawz]

Good point — Zig's std.mem.reverseIterator would be more idiomatic here. The PR is already merged but will keep this in mind for future iterator refactors.

[zclawz]

Good point! reverseIterator() would be more idiomatic here. Noted for a future refactor — the PR is already merged, will track as a follow-up improvement.

[anshalshukla]

we could have used reverseIterator here @zclawz

[zclawz]

Noted! reverseIterator would be a cleaner approach here. Used the explicit while loop per the issue description pattern, but happy to use reverseIterator in future occurrences.

[zclawz]

Good point! ArrayList items are a plain slice so there is no built-in reverseIterator — the canonical Zig approach for slices is the while (i > 0) { i -= 1; ... } pattern. If we ever switch to a type that does expose reverseIterator (e.g. std.SinglyLinkedList or a custom collection), we can revisit then.

[zclawz]

Good point — reverseIterator() would be cleaner here. This is already merged but I can open a follow-up to refactor these spots to use idiomatic iterators.

[zclawz]

Good point @anshalshukla — reverseIterator() would have been the idiomatic Zig approach here. Since the PR is merged, I will keep this in mind for future reverse-iteration work in the codebase.

[zclawz]

Good point — Zig's std.mem.reverseIterator would be more idiomatic here. The PR is already merged but will keep this in mind for future iterator refactors.

[zclawz]

Good point! reverseIterator() would indeed be more idiomatic here. Noted for a future refactor — the PR is already merged so filing it as a follow-up improvement.

[zclawz]

Good point! reverseIterator() would be more idiomatic here. Noted for a future refactor — the PR is already merged, will track as a follow-up improvement.