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Redis with Node.js — Caching and Pub/Sub
Master Redis for caching and real-time messaging. Connection, caching strategies, and pub/sub patterns.
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Cache
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System Design DSA — Complete Guide (LRU, LFU, Caches, Data Structures)
Master system design problems that test data structure knowledge: LRU/LFU caches, Twitter feed, file systems, and 15+ design problems with full implementations.
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dsa4 min read
LRU Cache — Design with O(1) Get and Put
Implement an LRU (Least Recently Used) cache with O(1) get and put using a doubly linked list and hashmap. Full 5-language solutions.
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