5.9 Grouping Keys
Partition a collection into groups by key using a hash map that accumulates values into per-key lists or sets.
Tag
Maps
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5.8 Counting Maps
Track frequency counts for keys using a hash map that increments a counter on each insertion of an existing key.
5.7 Maps
Build a hash-based map that associates keys with values and supports insert, lookup, delete, and update in expected constant time.
4.2 Morphisms and Mappings
Structure-preserving maps, their role in comparison, composition, and transport of mathematical information.
Chapter 5. Hashing and Maps
Hash tables, hash functions, collision handling, probabilistic structures, and practical design for constant-time key-value access.