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://github.com/amoilanen/Algorithms-with-Typescript [1] https://zencoder.ai/zenflow
Discussion Highlights (3 comments)
gausswho
this is well structured and put together. i would think it serves as a good base for refreshing oneself on the fundamentals. and it has a satisfying bend towards being both concise and thorough.
tossandthrow
This seems to be an entirely AI promoted post. dang: Can we get stuff like this out?
Permit
> and done a high-level pass on the rest. Why would I read your book if you have not read your book? Edit: I now understand what is going on here. This is an attempt to promote Zenflow. The GitHub account ( https://github.com/amoilanen/ ) is Anton Moilanen who is an employee at Zencoder, the creators of Zenflow. The account ( https://news.ycombinator.com/user?id=jsontwikkeling ) was created 86 days ago the same day as this Show HN post was created: https://news.ycombinator.com/item?id=46290617 It would probably be worth the moderator's time to see if this post was part of a coordinated upvote ring as well.