Data Structures & Algorithms

Hash Map

/hæʃ mæp/

Definition

A data structure mapping keys to values using a hash function, providing O(1) average lookup, insert, and delete.

Example in context

"Using a hash map for the seen nodes set makes the cycle detection algorithm O(n) instead of O(n²)."

Practice this term

Master Hash Map in context by working through exercises in the Data Structures & Algorithms module. You'll see the term used in real engineering scenarios with multiple-choice, fill-in-the-blank, and matching drills.

Frequently Asked Questions

What does "Hash Map" mean?

A data structure mapping keys to values using a hash function, providing O(1) average lookup, insert, and delete.

How do you pronounce "Hash Map"?

"Hash Map" is pronounced /hæʃ mæp/.

Can you use "Hash Map" in a sentence?

"Using a hash map for the seen nodes set makes the cycle detection algorithm O(n) instead of O(n²)."