Step through Manacher's linear-time algorithm for finding the longest palindromic substring, with an interactive visualization of each phase.
🌅Compare sunrise and sunset times across different cities throughout the year with interactive charts.
🏠Project mortgage payments, equity buildup, and investment returns across different scenarios.
📄Explore how B-Tree storage organizes cells within slotted pages, with interactive visualization of cell layouts, offset pointers, and free space management.
📊Compare demographic and statistical data across states, cities, and neighborhoods in California, New York, and Georgia.
📉Visualize how much you can borrow on margin without facing a margin call during market drawdowns, with historical crash scenarios.
👥Stacked bar chart showing employee headcount trends across major tech companies from 2011 to 2025.
🐍Practice Python coding challenges with an in-browser editor and automated test validation, powered by Pyodide.
🪟Step through the monotonic deque approach to the sliding window maximum problem, with interactive visualization of each phase.
🏛️Explore the five eras of Roman civilization from Kingdom to Byzantine Empire, with an interactive timeline, territorial maps, and historical summaries.
🤖See which free models on OpenRouter are actually good, ranked by ArtificialAnalysis intelligence index.
🧭Compare Forward Deployed Engineer roles across prestigious smaller tech companies — skills, role focus, target industry, and more.
🤝The 10 largest US M&A deals announced during each presidential term from Clinton I through Trump II, sized as a share of US GDP for each deal's year.
⚖️US equal-weighted vs US cap-weighted vs World cap-weighted ETFs over time — AI concentration, drawdowns, and total return with selectable metric pairs.
📈Each year's biggest tech IPO from 1990–2025, sized as parts per million of the S&P 500's total market cap on the IPO date.
🗽Filter the world's countries by compound percentile of government and economic freedom — combining Freedom House, EIU, Heritage, and Fraser indices.
☁️Side-by-side cost comparison of exe.dev's Personal & Cloud Pool plans against Hetzner Cloud CCX and AWS EC2 m7a, matched 1-to-1 by vCPU and RAM, with a non-linear transfer slider.
🔥A senior engineer's design doc for AWS's microVM monitor — architecture, threat model, snapshots, and how it compares to QEMU, gVisor, and containers.
⚡A senior engineer's design doc for the open-source LLM inference engine — PagedAttention, continuous batching, prefix caching, and the V1 rewrite.
🐘A senior engineer's design doc for the OLAP database — parts and granules, vectorized SIMD execution, distributed two-stage aggregation, ClickHouse Cloud's SharedMergeTree, and how it compares to Snowflake, BigQuery, and Druid.
🧪A working Python developer's guide to property-based testing with Hypothesis — strategies, the @given decorator, automatic shrinking to minimal counterexamples, stateful testing, and the properties worth asserting.