midHash Tables
What is Rehashing?
Updated Apr 28, 2026
Short answer
The process of increasing the table size and redistributing entries when the load factor exceeds a threshold.
Deep explanation
Intermediate hash table mechanics focus on optimization and collision management. The process of increasing the table size and redistributing entries when the load factor exceeds a threshold.
Real-world example
Database indexing for unique identifiers.
Common mistakes
- Forgetting that resizing requires re-calculating the hash for every existing item.
Follow-up questions
- Why is table size usually a prime number?