I tend to argue things in a particular way because I’m in a high-trust environment.

An introduction to the crate pattern for representing existential quantification in F#.

A rather little-known but very easy and high-reward way to sanity-check your property-based tests.

First-class support for a –dry-run mode makes a tool more maintainable, more testable, and more user-friendly.

Motivating the technique of continuation-passing style, by looking at recursive functions.

An exploration into reaching into the internals of Mathematica to natively evaluate C code.

An incomplete but growing list of things I would make mandatory reading if I were building a software engineering syllabus.

A quick note from Hacker News about how to model in F# something that might look like cyclic dependencies.

A checklist I have used during my regular six-monthly life review.

A cute little exercise in bug-spotting.

A bug I found and reported in Git.

A round of questions I wrote for a Christmas quiz.

My notes on the production of a Christmas dinner.

Some techniques to help you get more out of Anki.

A quick note from Hacker News about a neat fact from general relativity.

A quick note from Hacker News about why we want optional types but why ’null’ is unintuitive.

A quick note from Hacker News about a beautiful proof of the uncountability of the reals.

How to write loops immutably and safely.

A quick note from Hacker News about my preference for static config rather than dynamic.

An underappreciated tool for writing good software.