Lips Scheme 1.0.0-beta.22 with full call/cc and TCO
I'm excited to introduce a new beta version of LIPS Scheme. The most important features of this
In plain words
LIPS Scheme 1.0.0-beta.22 is a Scheme programming language implementation that introduces full call/cc continuations and tail call optimization. It allows developers to write functional programs with advanced control flow features, including early exits from recursive functions. The software is designed for programmers interested in Lisp-like languages and functional programming paradigms.
written from the facts on this page · September 2026
From the sources
I'm excited to introduce a new beta version of LIPS Scheme. The most important features of this version are full continuations and TCO (Tail Call Optimization) . They were inspired by JS-Scheme by Alex Yakovlev. You can now finally play with continuations . Here is a simple example of an early exit from a recursive named let. ( define ( find fn lst ) ( call/cc ( lambda ( return ) ( let loop ( ( lst lst ) ) ( if ( null? lst ) ( return #f ) ( if ( fn ( car lst ) ) ( return lst ) ( loop ( cdr lst ) ) ) ) ) ) ) ) ( find ( lambda ( x ) ( print x ) ( zero? x ) ) ' ( 2 1 0 1 2 3 4 5 6 7 ) ) ;; ==> 2 ;; ==> 1 ;; ==> 0 ;; ==> (0 1 2 3 4 5 6 7) JavaScript Generators Finally, LIPS has native…from lips.js.org
Does the same job
all alternatives →- SLScheme-langserver – Digest incomplete code with static analysisFeb 2026 · github.com · ▲52
Scheme-langserver digest incomplete Scheme code to serve real-world programming requirements, including goto-definition, auto-completion, type inference and such many LSP-defined language feature supports. And this project is based here(https://github.com/ufo5260987423/scheme-langserver). I built it because I was tired of Scheme/Lisp's raggy development environment, especially of the lack of IDE-like highly customized programing experience. Though DrRacket and many REPL-based counterparts have don't much, following general cases aren't reach same-level as in other…
- PA"Programming Algorithms in Lisp” Book2021 · apress.com · ▲232
- APA pure C89 implementation of Go channels, with blocking selects2023 · github.com · ▲271
- LILisp implementation in modern Java, Go, C#, TypeScript, Python2021 · github.com · ▲128
- IWI wrote a technical history book on LispFeb 2026 · berksoft.ca · ▲252
The book page links to a blog post that explains how I got about it (and has a link to sample content), but the TL&DR is that I could not find a lot of books that were on "our" history _and_ were larded with technical details. So I set about writing one, and some five years later I'm happy to share the result. I think it's one of the few "computer history" books that has tons of code, but correct me if I'm wrong (I wrote this both to tell a story and to learn :-)). My favorite languages are Smalltalk and Lisp, but as an Emacs user, I've been using the latter for much longer and for my…
- CVCFR[]: Very minimal drawing language with 5 commands: C, F, R, [, ]2023 · susam.net · ▲176
More life & fun this month
the category →- TL
Life & fun · 10d ago · louisabraham.github.io
Photosynthesis fires two of your iPhone
Life & fun · 29d ago · photosynthesis.camera
SoloUno▲310Take control of hair pulling, nail biting & skin picking
Life & fun · 28d ago · solouno.io
Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 27d ago · everycube.alen.is
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 27d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com