My router runs OPNSense Business. I like having an open-source router, but I have a few gripes with it. My biggest issue is that, by default, OPNsense can’t resolve hostnames on my local network. Why can’t OPNsense resolve local hostnames? For every other router I’ve owned in my life, if there’s a computer on my network named foo123 and I run ping foo123, then everything just works, and my computer successfully pings foo123.

The term “cold email” refers to emailing someone who you’ve never spoken to before. There are lots of guides on writing cold emails. This one is a bit niche, as it’s about cold emailing a particular person: me. But I guarantee you that it’s the best guide you can find on this hyperspecific topic. I’m publishing my guidelines under the Creative Commons BY-4.0 license, so you’re welcome to reuse or adapt them to guide people in emailing you.

I have a few Samsung SSDs, and I always have trouble remembering the process of secure erasing them, as Samsung Magician software is terrible. Here are my notes for overcoming Samsung Magician’s gotchas in the process of secure erasing a Samsung SSD. You need a Windows or MacOS system with a Samsung SSD attached This requirement drives me crazy, as Samsung Magician is creating a bootable USB disk, so it shouldn’t care what’s on your current system, but it does. And Samsung Magician only exists for Windows, MacOS, and Android, so if you’re on Linux, you can’t use it.

Highlights I published the first chapter of my book and was happy with the reception. My attempt to hire a book cover designer flopped. I may have figured out how to support large files on PicoShare. Goal grades At the start of each month, I declare what I’d like to accomplish. Here’s how I did against those goals: Finish two chapters of Refactoring English Result: Finished one chapter and got 75% through the next. Grade: B The first chapter took longer than I expected, as I kept finding parts that I wanted to rewrite. I did find it helpful to take a break for a week to write a second chapter and come back fresh.

There’s an excellent Go testing pattern that too few people know. I can teach it to you in 30 seconds. Instead of writing Go tests like this: // The common, unrefined way. username := GetUser() if username != "dummyUser" { t.Errorf("unexpected username: got %s, want: %s", username, "dummyUser") } Write your tests like this, beginning each assertion with if got, want :=: // The underused, elegant way. if got, want := GetUser(), "dummyUser"; got != want { t.Errorf("username=%s, want=%s", got, want) } The if got, want :=: pattern works even better in table-driven tests. Here’s an example from my library for parsing social media handles: