“Know how to solve every problem that has been solved.” “What I cannot create, I do not understand.” — Richard Feynman

Hashmap lookup by key is O(1) on average under a well-distributed hash; worst case is O(n) when collisions degenerate.

Claims

Hashmap lookup by key is O(1) on average under a well-distributed hash; worst case is O(n) when collisions degenerate.

✓ supported structural 90% stub data-structuresalgorithmscomplexityhashmap
id: hashmap-lookup-is-o-1 created: 2026-05-21 ← all claims