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 ⭐
gvc (Git Visual Compare)
A lightweight macOS GUI for viewing git diff output. The ease of a visual diff viewer, the power of a command-line diffing tool.
Revise MCP
An MCP server providing text-based tools to revise and refactor code, designed to be highly usable for AI agents.
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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