This is a short and simple post, that is part 3 in a series: How far away is the most remote part of the UK?How far away is the closest bit of the EU?Which bits of the EU are the closest? The code I wrote to calculate the distances for the previous article also kept … Continue reading Which bits of the EU are closest to the UK?
This article is about captured variables in C#. In case you've not come across them before, they're where some code appears to capture and drag with it a variable declared outside the code, such that the code can continue using the variable long after it appears that this should be possible. They’re not something I … Continue reading Captured variables
This is part two in a series about variance – contravariance and covariance. Arrays and listsContravariance in interfacesCovariance in interfaces In the previous article I introduced the concepts of variance and type size. I also gave arrays as an example of covariance. In this article I’ll give an example of contravariance, and go into more … Continue reading Covariance and contravariance, part 2: Contravariance in interfaces
This article is the combination of a few different things. For a long time, I’ve wanted to visualise in some way the details of the plot to the film Ocean’s 11. Also, occasionally I get grumpy about decrees about how people should document their code. Finally, I recently attended a talk given by my friend … Continue reading Describing films and code using pictures
This post is the first in a series - for once I will split a large topic into a few small posts. The series is about covariance and contravariance, together known as variance. Arrays and listsContravariance in interfacesCovariance in interfaces Covariance and contravariance are terms I came across occasionally, and never understood properly. Having put … Continue reading Covariance and contravariance – part 1: Arrays and lists
This article is part two in a series: How far away is the most remote part of the UK?How far away is the closest part of the EU?Which bits of the EU are the closest? The previous article talked about how I produced a kind of choropleth map – instead of the colour on the … Continue reading How far away is the EU?
Someone posted a question in a Ministry of Testing Slack channel about introducing mutation testing at work. My answer is below, as someone suggested I turn it into a blog post. I've edited it slightly to make it stand on its own rather than as a response to a particular person's question. It's basically a … Continue reading Using User Experience Techniques to Introduce Mutation Testing
This article is my attempt to put my money where my mouth is. A friend mentioned the BBC Radio 4 series In Our Time on Facebook, and in the conversation that followed I said that the only time In Our Time discussed something close to my home turf I got grumpy about how poorly I … Continue reading P = NP?
A computer system, like a car or a coffee machine, is something designed to meet some requirements. These requirements usually force the designer to make a compromise, based on which requirements get more attention than others. (Which is the best car? It depends on whether speed, size, sustainability etc. are most important to you.) One … Continue reading Random numbers to protect privacy in a pandemic app
I recently came across a kind of visualisation called a Bump Chart. This looked oddly familiar to me, and I realised that I knew it as a Bumps Chart (plural). I searched the internet to see if one was the origin of the other, but couldn’t find anything. I’m not claiming to be the authoritative … Continue reading Bump or bumps charts