Python
Python vs C++ Procedural Programming Compared
Compare Python vs C++ procedural programming with an interactive simulator. See execution flow, memory handling, and performance differences step-by-step.
10 min read
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System DesignDatabases
Strong vs Eventual Consistency: Pick Your Trade-off
See the real difference between strong and eventual consistency. Interactive simulator shows how banks and social media make different choices.
8 min read
System Design
Distributed Systems Fundamentals: Why, What Breaks, and How
Master distributed systems fundamentals. Learn why we distribute, what breaks, core vocabulary, and trade-offs with interactive visualizations.
12 min read
System DesignDatabases
Replication Topologies: Single-Leader, Multi-Leader, Leaderless
Master database replication patterns. Compare single-leader, multi-leader, and leaderless topologies with interactive visualizations and real-world examples.
10 min read
System DesignDatabases
Cascade Failures: How One Service Takes Down Your Entire System
See how one failing microservice crashes your entire distributed system. Learn the mechanics behind real-world AWS and Facebook cascade outages.
6 min read
LeetcodeTwo Pointers
3Sum: Fix One Element, Reduce to Two Sum with Two Pointers
Learn why 3Sum reduces to sorted Two Sum. Interactive visualizer shows how fixing one element and using two pointers drops O(n³) to O(n²).
12 min read
LeetcodeTwo Pointers
Trapping Rain Water: Why the Shorter Wall Controls Everything
Learn why water at each bar depends on its tallest neighbors. Interactive visualizer shows how two pointers find trapped water in one pass.
10 min read
LeetcodeTwo Pointers
Container With Most Water: The Two-Pointer Pattern That Shrinks O(n²) to O(n)
Learn why the shorter wall limits everything. Interactive visualizer shows how two pointers eliminate entire rows of possibilities in one pass.
10 min read
LeetcodeArrays
Next Permutation: Visualizing the Lexicographical Step
See why Next Permutation is about finding the rightmost ascent. Interactive visualizer shows how one scan from the right transforms O(n!) brute force into O(n).
9 min read
System DesignScalability
How Instagram Explore Recommends Content to 2B Users
Learn how Instagram Explore uses ML to recommend content. Understand two-tower models, candidate generation, and real-time ranking.
10 min read
AIComputer Vision
Hough Transform: Visualizing Line Detection Step by Step
Learn the Hough Transform with our interactive simulator. Understand how edge points vote in parameter space to detect lines in images.
6 min read
AIComputer Vision
Image Pyramids: Multi-Scale Processing Visualized
Learn image pyramids with our interactive simulator. Understand Gaussian and Laplacian pyramids for multi-scale image processing and seamless blending.
6 min read