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SSSiddhesh Sawantsiddheshsawant.hashnode.devMay 31 · 7 min read

Why Mutable Objects Break HashSet

Most Java developers use HashSet every day. Set<String> names = new HashSet<>(); We add elements, check if they exist, remove them, and move on. But what if I told you that a single field modificatio

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SRSreekar Reddyesreekarreddy.hashnode.devMay 10 · 2 min read

🗺️ Maps Explained Like You're 5

Key-value pairs for lookup Day 136 of 149 👉 Full deep-dive with code examples The Phone Book Analogy Remember phone books? Find "Smith" → Flip directly to S section Look up the name → Get the phone number You don't scan from the beginning! Maps w...

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SRSreekar Reddyesreekarreddy.hashnode.devMay 9 · 2 min read

🎯 Sets Explained Like You're 5

Collections with no duplicates Day 135 of 149 👉 Full deep-dive with code examples The Guest List Analogy You're making a party guest list: Add "Alice" → Alice is on the list Add "Bob" → Bob is on the list Add "Alice" again → Nothing happens! She's...

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SRSreekar Reddyesreekarreddy.hashnode.devMay 8 · 2 min read

🔤 Tries Explained Like You're 5

Trees for storing strings efficiently Day 134 of 149 👉 Full deep-dive with code examples The Autocomplete Analogy When you type on your phone: Type "hel" → Suggestions: "hello", "help", "helicopter" Type "help" → Suggestions: "help", "helpful", "h...

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SRSreekar Reddyesreekarreddy.hashnode.devMay 7 · 2 min read

🌲 Binary Trees Explained Like You're 5

Each node has at most two children Day 133 of 149 👉 Full deep-dive with code examples The Family Tree Analogy Imagine a family tree where each person can have at most two children. The top person is the root, with branches going down. A binary tree...

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DGDean Gilleygwnwords.hashnode.devApr 23 · 4 min read

Shrinking a 250K-word dictionary to 500KB: from tries to DAWGs to succinct bit-packed trees

Shrinking a 250K-word dictionary to 500KB: from tries to DAWGs to succinct bit-packed trees If you are building a word game for the browser, you are fighting a constant battle against the "bundle size tax." When you need to validate moves against a s...

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SBSufyan bin Uzayrsufyanism.hashnode.devApr 15 · 2 min read

Blueprint: The OAPEN Schema: Standards for Monograph Interoperability

The Universal Monograph Schema: Technical Protocols for Interoperability, Metadata Integrity, and Global Discovery within the OAPEN and DOAB Networks Metadata for open-access monographs is scattered,

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DSDoogal Simpsondoogal.devMar 28 · 4 min read

Git Internals: Why Your Commits Aren't Actually Diffs

TL;DR: Git is a content-addressable filesystem that stores project states as full snapshots rather than incremental deltas. Every object—blobs, trees, and commits—is identified by a unique SHA-1 hash

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SRSreekar Reddyesreekarreddy.hashnode.devMar 27 · 2 min read

🏔️ Heaps Explained Like You're 5

Priority queues with fast access to min/max Day 92 of 149 👉 Full deep-dive with code examples The Hospital ER Analogy In an emergency room: Patients aren't treated first-come-first-served Most critical cases get priority The system can keep the mo...

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SRSreekar Reddyesreekarreddy.hashnode.devMar 26 · 2 min read

🕸️ Graphs Explained Like You're 5

Networks of connected nodes Day 91 of 149 👉 Full deep-dive with code examples The Road Map Analogy A road map shows cities connected by roads: Cities = Nodes (vertices) Roads = Edges (connections) Some roads are one-way (directed) Some have distan...

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#datastructures

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Trending tags this week

Why Mutable Objects Break HashSet

🗺️ Maps Explained Like You're 5

🎯 Sets Explained Like You're 5

🔤 Tries Explained Like You're 5

🌲 Binary Trees Explained Like You're 5

Shrinking a 250K-word dictionary to 500KB: from tries to DAWGs to succinct bit-packed trees

Blueprint: The OAPEN Schema: Standards for Monograph Interoperability

Git Internals: Why Your Commits Aren't Actually Diffs

🏔️ Heaps Explained Like You're 5

🕸️ Graphs Explained Like You're 5