Show HN: Algorithms and Data Structures in TypeScript – Free Book (~400 Pages) https://ift.tt/uIxcKqa

Show HN: Algorithms and Data Structures in TypeScript – Free Book (~400 Pages) I started writing this book 10 years ago in JavaScript, got through a few chapters (asymptotic notation, basic techniques, start of sorting), and then abandoned it. Recently I picked it back up, converted everything to TypeScript, and used AI (Zenflow [1] + Claude Opus 4.6) to complete the remaining chapters. I provided the structure, direction, and initial chapters; the AI generated the bulk of the remaining content under a spec-driven workflow. The book covers roughly a first 1-2 year CS curriculum: sorting, dynamic programming, graph algorithms, trees, heaps, hash tables, and more. All code is executable, typed with generics/interfaces, and covered with tests. I've thoroughly reviewed several chapters (sorting, DP, graphs) and done a high-level pass on the rest. Currently in beta — corrections and contributions are welcome. MIT licensed. Inspired by Wirth's "Algorithms and Data Structures", SICP, and CLRS. Code and tests: https://ift.tt/q7NRrTC [1] https://ift.tt/PO9dRMh http://amoilanen.github.io/Algorithms-with-Typescript/ March 13, 2026 at 09:15AM

Show HN: What was the world listening to? Music charts, 20 countries (1940–2025) https://ift.tt/4IJt0o6

Show HN: What was the world listening to? Music charts, 20 countries (1940–2025) I built this because I wanted to know what people in Japan were listening to the year I was born. That question spiraled: how does a hit in Rome compare to what was charting in Lagos the same year? How did sonic flavors propagate as streaming made musical influence travel faster than ever? 88mph is a playable map of music history: 230 charts across 20 countries, spanning 8 decades (1940–2025). Every song is playable via YouTube or Spotify. It's open source and I'd love help expanding it — there's a link to contribute charts for new countries and years. The goal is to crowdsource a complete sonic atlas of the world. https://88mph.fm/ March 10, 2026 at 01:18PM

Show HN: Global Maritime Chokepoints https://ift.tt/9kETIc0

Show HN: Global Maritime Chokepoints https://ift.tt/j5u7pBv March 13, 2026 at 01:42AM

Show HN: I built a screen recorder with automatic zoom effects https://ift.tt/evMP1gV

Show HN: I built a screen recorder with automatic zoom effects https://rookieclip.com/ March 12, 2026 at 07:51AM

Show HN: XLA-based array computing framework for R https://ift.tt/txa9pod

Show HN: XLA-based array computing framework for R https://ift.tt/adiPFSj March 9, 2026 at 03:04AM

Show HN: Jurassic Park Unix System Kubernetes Viewer https://ift.tt/1lDbdYr

Show HN: Jurassic Park Unix System Kubernetes Viewer I made an app that allows you to view Kubernetes resources just like the unix system in Jurassic Park :) Unlikely to be used for anything serious, but with the tools available today I couldn't let the idea slip. https://ift.tt/rB2KYZu March 12, 2026 at 04:11AM

Show HN: Silly Faces https://ift.tt/IrNXfpt

Show HN: Silly Faces Tap on the canvas to create silly faces. Discover new brushes by combining them on the canvas. Used to be a React Native app from the pre-AI ages. Recently ported with AI to be just a wordpress plugin. https://ift.tt/R2gLCrA March 10, 2026 at 11:14AM