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Group Anagrams: the canonical-key hash-map pattern.

Group Anagrams tests the 'compute a canonical key and bucket by it' pattern. The signal is choosing a key that anagrams share without comparing every pair. Here is the answer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

Group Anagrams tests the 'compute a canonical key and bucket by it' pattern. The signal is choosing a key that anagrams share without comparing every pair. Here is the answer.

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