Writing a C compiler in 500 lines of Python

• nanoGPT

  69 31,713 5.4 Python

  The simplest, fastest repository for training/finetuning medium-sized GPTs.

It does remind me of a project [1] Andrej Karpathy did, writing a neural network and training code in ~600 lines (although networks have easier logic to code than a compiler).

[1] https://github.com/karpathy/nanoGPT

• schism

  7 188 10.0

  A self-hosting Scheme to WebAssembly compiler (by schism-lang)

  

Looks like Schism (https://github.com/schism-lang/schism) got part of the way there, but it unfortunately seems to be dead.

• SurveyJS

  surveyjs.io sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

• micrograd

  22 8,273 0.0 Jupyter Notebook

  A tiny scalar-valued autograd engine and a neural net library on top of it with PyTorch-like API

Perhaps they were thinking of https://github.com/karpathy/micrograd

• nearley

  3 3,548 0.0 JavaScript

  📜🔜🌲 Simple, fast, powerful parser toolkit for JavaScript.

While I suspect I would learn more writing a tokenizer and parsing logic myself I find grammars much easier to read and maintain.

ANTLR is pretty good and is supported across several languages and something I had previously used for some quick Elasticsearch query syntax munging in Python. It also means you can often start from an already existing grammar.

The JS version of ANTLR didn't seem to work for me so for the SQL/JSONPath stuff ended up using the Moo lever and Nearly parser which was rather pleasant. https://nearley.js.org

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