Tries and Prefix Trees - Autocomplete, Spell Check, and IP Routing

Public lesson preview

Master the trie data structure for lightning-fast prefix lookups. Build autocomplete, wildcard search, and explore compressed tries and IP routing.

Programme: AI Chisel
Level: Advanced
Reading time: 18 min read

Learning objectives

By the end of this lesson, you will understand:

What Is a Trie?
The TrieNode Class
Core Operations
Autocomplete with DFS
Wildcard Search - Word Dictionary

Lesson outline

What Is a Trie?
The TrieNode Class
Core Operations
Insert - O(m) where m = word length
Search and startsWith
Autocomplete with DFS
Wildcard Search - Word Dictionary
Longest Common Prefix
IP Routing with Tries
Compressed Tries (Radix Trees)
Time and Space Complexity
When to Reach for a Trie
📚 Further Reading

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Tries and Prefix Trees - Autocomplete, Spell Check, and IP Routing

Learning objectives

Lesson outline

Continue Tries and Prefix Trees - Autocomplete, Spell Check, and IP Routing with Pro