midTrie
Memory optimization: Array vs Hash Map in nodes
Updated Apr 28, 2026
Short answer
Arrays are O(1) but wasteful; Hash Maps are space-efficient but have O(1) average overhead.
Deep explanation
Mid-level analysis of Memory optimization: Array vs Hash Map in nodes. Focuses on algorithmic variations and efficiency trade-offs in real applications.
Real-world example
Search engine search bars.
Common mistakes
- Searching for a prefix and returning the entire Trie instead of just child words.
Follow-up questions
- How to limit autocomplete results?