DaFoster
My name is David Foster. Check out the cool software I’ve written!
My articles may also be of interest:
Featured Articles ⭐
- Feb 16, 2021 » Building web apps with Vue and Django (2024) - The Ultimate Guide ✚
- Nov 24, 2018 » Why isn't the external link symbol in Unicode?
- Mar 25, 2017 » How to Design Large Programs with Abstraction and Encapsulation
- Sep 13, 2015 » State of the Union in Programming Languages (2015)
- Dec 20, 2014 » Spectrum of Languages by Hardware Distance
- May 11, 2013 » Programming for Perfectionists (P4P): A Book Outline
- Apr 21, 2013 » Exploring Onionland: The Tor .onion Darknet
- Feb 20, 2013 » Visual Guide to Programming Language Properties
- Jan 15, 2013 » Things I Wish I Knew Before Working in Industry ✚
- Jan 08, 2013 » Programming is Fun. But What Matters is Solving a Real Problem.
Recent Articles
- Aug 20, 2025 » Issue counts always go up
- Jul 22, 2025 » Designing Software in the Large
- Mar 16, 2025 » The trouble with the Symbol type
- Mar 13, 2025 » Dumping a traceback when an error message is printed
- Aug 18, 2024 » Effective Code Reviews
- Jun 16, 2024 » PyCon US 2024 Highlights
- Mar 24, 2024 » Redis relicensing: Why is this a problem?
- Feb 28, 2024 » Bulkheads: A pattern for handling unexpected errors in software
- Oct 20, 2023 » Debugging a deadlock in Python
- Oct 12, 2023 » Custom file icons, folder icons, and app icons on different operating systems
Featured Projects ⭐
TypedDict
Python typechecker support for recognizing structured dictionaries with specific named keys mapped to specific value types. Ubiquitous in JSON.
Crystal: A Website Archiver
Crystal is a free website downloader and archiver for Mac, Windows, and Linux. Save entire websites for offline viewing and long-term digital preservation.
RDiscount
Converts Markdown text to HTML, in Ruby. Includes many useful Markdown extensions.
trycast
Parses JSON-like values whose shape is defined by typed dictionaries (TypedDicts) and other standard Python type hints.
Revise Skill
An Agent Skill that performs common code quality revisions on AI-drafted code, optimizing it for human readers.
Miscellaneous
Much information related to my activities prior to 2010 can also be found on my old site.
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