Web Reference: Jul 23, 2025 · The basic idea behind implementing an LRU (Least Recently Used) cache using a key-value pair approach is to manage element access and removal efficiently through a combination of a doubly linked list and a hash map. Sep 21, 2024 · This C program implements an LRU cache using a doubly linked list and a hash map. The hash map allows for fast access, and the doubly linked list ensures that we can efficiently remove and insert elements in O (1) time. The intuition behind an LRU (Least Recently Used) Cache is that we want to store only a fixed number of items in memory and quickly evict the item that hasn’t been used for the longest time.
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