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Initially I wanted to write articles on those two topics separately (mocking time and testing event loops), but during the process I realized that the things I want to talk about are too interrelated: when I need to mock time, it's usually to test some event loop with it, and when I test event loops, typically mocked time is also involved in that.
So in the end, it felt better to just combine all that in a single article.
I really love the security level U2F provides, but together with security, we have to think carefully about the backup and recovery plan. It would totally suck to get locked out of my accounts if something happens with my U2F token. At the same time, it doesn't make sense to have a backup which compromises U2F security.
As I was saying already, I love Go, I really do. And in particular I like the minimalistic approach to error handling: no exceptions, each caller should check the error explicitly and deal with it as it wants.
Many years ago, I've been waiting for a language like Go. Back then, I was primarily working with C (for microcontrollers), and C++/Java/Python/etc (for bigger machines). These are great tools, but still I was longing for compiled, statically typed, memory-safe (and garbage collected) language, which compiles for the target platform machine code, and has a big enough community.
At Cesanta, we use Makefiles to build our firmwares, libraries, and perform other things. But the more I use
make, the less I like it. I want my incremental builds to be reliable, and I want to be able to reuse my Makefiles as needed.
make can't provide that, and builds just kinda-sorta work most of the time.
Most annoying issues are:
I use Docker, but not often enough to memorize even basic Dockerfile instructions and CLI commands. After all I got so annoyed by being unable to quickly sketch some Dockerfile or to do something with the existing containers occasionally, so I decided to write a concise cheat sheet which I can print once and constantly keep on my desktop:
You may probably consider this a rant post.
I work with embedded stuff for several years: our company develops and manufactures car trip computers, battery chargers, and other car-related electronic devices.
The processors used for our designs are primarily 16- and 32-bit Microchip MCUs, with RAM from 8 to 32 KB, and ROM from 128 to 512 KB, without any kind of MMU. Sometimes, there are even more modest 8-bit chips.
The usage of real-time socket connection with authentication data seems quite regular thing to me. And, personally, I find it very strange that this topic receives so little interest.
I needed to develop an utility application in Qt, which should work in Windows. I use Linux, and this is no problem since Qt is crossplatform, but anyway, to make sure resulting application works in Windows as intended, I've installed Qt in Windows guest OS in VirtualBox.
Surprisingly, at the time of writing this, there were two issues running Qt Creator in Windows guest OS.
Recently I had an opportunity to work with Ragel State Machine Compiler in my Qt project (There was a requirement to parse binary protocol), and the question was, how to integrate Ragel source files in the project conveniently. After all, I've read about qmake's
QMAKE_EXTRA_COMPILERS facility, which does the job very well.