3 ms·
What he probably means is he imagines the moved-from vector still has elements in it, and indexes into the empty. Another argument for at() outside loops.
by ncmncm 4y ago
What he probably means is he imagines the moved-from vector still has elements in it, and indexes into the empty. Another argument for at() outside loops.
- throwaway2037 4y agoYes, and most algorithms are "surpising" when a container is empty. Most people write, then read, algorithm code imagining a container full of elements. I've been caught by that "bug" so many times, that I now annotate (Java) when containers can be empty. The first few times co-workers see it, they are confused. They they re-read the code, and "oh, I get it. when empty, the code path is very different!" Unlike nullable values, empty collections (usually) don't cause exceptions.