This was a good way to see a number of non-trivial applications in Go. It tackled real projects like a Markdown Previewer and a Port Scanner and used production-grade libraries like Cobra for command-line arguments and Viper for configuration settings. The Markdown Previewer was probably good enough for me to consider using it. Honestly, Cobra and Viper were good enough libraries that it makes me start looking at what my options are for command-line parsing libraries early when studying a new language now. A lot of the examples were big to type, but that is good since it made me feel more comfortable with the language. They were also complicated enough that I made mistakes and got to deal with error messages from the compiler. I will say I was disappointed multiple times that Go’s compiler points out the first error it finds and then stops, so when you fix it you might just be greeted by another error. It’s not like Java or Kotlin where the compiler spits out 10 errors and 5 are probably caused by the earlier errors but the other 5 need to be corrected. The pomodoro app was actually quite usable after I got past the fact that it wouldn’t display correctly in tmux. That was a hard debugging session wondering what was wrong with my output from typing up the code before I finally pinned the blame on running it in a tmux session though, since having a tmux session is just getting so normal to me. Not only did I learn a lot about using Go for small to intermediate-sized projects, but I learned a lot about writing good command-line apps that I can take with me to other languages.
Full book notes.