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The curriculum, drills, tutor, and interviewer mode are for readers of Ace the Rust Interview. The code is printed in the Preface (Companion site access).

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intermediate · order 134

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graph-gen-01Related book chapters: 21 (optional — this page is complete on its own)generational

Slug: graph-gen-01 · Paired reading: Chapter 21

Prompt

Implement a generational Arena<T> with NodeId { index, generation }, free-list reuse, insert / remove / get. After remove(id) then insert into the recycled slot, the old id must yield None from get (ABA defeated).