Hash Tables and Hash Functions - Why key lookup is O(1)?

In this video we will explore how the hash table works under the hood and explaining why it is such an efficient data structure. We also explain how hash tables are able to index keys using a hashing function. We will explain how the hashing function works.
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DSA TS Playlist: • Data Structures and Al...
00:00-00:39 - Introduction
00:40-05:16 Simple hash function
05:17-08:46 - Avoid collisions with LL
08:47 - Optimised hash functions

[@shokukogonzales7529]

Hi, do You have source code of the example?

[@JonPeppinck]

Sorry, I don't because this was a simplified example to understand conceptually how a hash table and hash function work.