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Decode the Coding Interview in Ruby: Real-World Examples

DIY: Insert, Delete, and GetRandom in O(1)

Understand how to build a set data structure that supports insert, remove, and getRandom operations in O(1) time. This lesson guides you through implementing these functions efficiently, preparing you for Amazon-style coding interview problems involving constant time operations.

We'll cover the following...

Problem statement

Implement a set data structure that can perform the following operations:

  • insert(data): This function should insert data into the set (if the set does not contain it already). It should return false if the data already exists in the set. Otherwise,
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