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by oconnor663
543 days ago
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> There's no way for Rust to prevent you from marking an array index as free and later using it. I 2/3rds disagree with this. There are three different cases: - Plain Vec<T>. In this case you just can't remove elements. (At least not without screwing up the indexes of other elements, so not in the cases we're talking about here.) - Vec<Option<T>>. In this case you can make index reuse mistakes. However, this is less efficient and less convenient than... - SlotMap<T> or similar. This uses generational indexes to solve the reuse problem, and it provides other nice conveniences. The only real downside is that you need to know about it and take a dependency. |
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