AIComputer Vision
Visualizing Optical Flow: How Computers Track Motion
Learn optical flow with our interactive simulator. Understand Lucas-Kanade and Horn-Schunck methods for motion estimation in computer vision.
6 min read
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AIMath
Gaussian Distribution: Visual Guide & Interactive Calculator
Master the Gaussian distribution with our interactive calculator. Learn the formula, understand the bell curve, and calculate probabilities step by step.
9 min read
AIMath
Binomial Distribution: Visual Guide & Interactive Calculator
Master the binomial distribution with our interactive calculator. Learn the formula, explore probability tables, and calculate variance step by step.
9 min read
AIMath
Poisson Distribution: Visual Guide & Interactive Calculator
Learn the Poisson distribution with our interactive calculator. Understand the formula, explore real examples, and master probability calculations step by step.
9 min read
AIMath
How to Calculate Probability: Visual Guide & Interactive Calculator
Learn how to calculate probability with our interactive calculator. Master the conditional probability formula and law of total probability step by step.
12 min read
System DesignScalability
How Netflix Deploys to 200M Users Without Downtime
Learn how Netflix deploys code to 200+ million users with zero downtime using blue-green deployment. A deep-dive case study into their deployment architecture.
8 min read
System DesignScalability
How Google Tests Changes on 8.5 Billion Daily Searches
Learn how Google safely deploys to billions of users using canary releases. A deep-dive case study into their progressive rollout strategy.
9 min read
System DesignDatabases
How Discord Stores Trillions of Messages
Learn how Discord stores trillions of messages and why they migrated from MongoDB to Cassandra to ScyllaDB. A deep-dive into their database evolution.
10 min read
System DesignCaching
How Meta Scaled Memcached to 1 Billion Users
Learn how Facebook scaled Memcached to handle 1 billion users with billions of requests per second. A deep-dive into their distributed caching architecture.
10 min read
LeetcodeArrays
Two Sum: The Hash Map Trick That Drops O(n²) to O(n)
See why Two Sum is just an existence check. Interactive visualizer shows how one equation turns O(n²) brute force into O(n) with hash maps.
8 min read
System DesignDatabases
How MongoDB Works: A Visual Guide to Document Databases
Learn how MongoDB works from first principles. Interactive simulators for document storage, BSON structure, indexing, and the aggregation pipeline.
10 min read
System DesignDatabases
How PostgreSQL Works: Pages, Indexes, MVCC & WAL Explained
See how PostgreSQL works under the hood: 8KB pages, B-tree indexes, MVCC concurrency, and WAL durability explained with interactive diagrams.
10 min read