8 Dictionaries and Hashes

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In the previous chapter, we delved into the world of sets, focusing on their ability to efficiently store unique values. Building upon this foundation, we will now explore two more data structures designed for storing distinct elements: dictionaries and hashes.

While sets prioritize the value itself as the primary element, dictionaries and hashes take a different approach. Both structures store data as key-value pairs, allowing us to associate a unique key with a corresponding value. This pairing is fundamental to how dictionaries and hashes work.

However, there is a subtle yet important distinction in implementation. Dictionaries, as we will soon discover, adhere to a strict rule...