The LRU Cache

The LRU cache is a popular caching strategy that discards the least recently used items first. This cache eviction policy is based on the assumption that items that have not been accessed recently are less likely to be accessed in the near future. Let us look at how we can implement an LRU cache in Go.

Setup

First, we need to define a data structure that represents a cache entry. The entry should contain the key and value of the cached item. We also need to define a doubly linked list node to manage the order of the entries in the cache.