Visit eklitzke.org → On Hacker News Nov 2016 – Oct 2022
Software Engineering 6Tools & Productivity 4Systems & Performance 4Security & Privacy 1Math & Algorithms 1Programming Languages 1
In Bash, there are two closely related "special parameters" for accessing how the current script was invoked: $* and $@ . For both variables, the behavior is affected by whether or not the variable is enclosed in double quotes. The following table summarizes all cases:
You'll often see instructions for creating and using disk images on Unix systems making use of the dd command. This is a strange program of [obscure provenance](https://en.wikipedia.org/wiki/Dd_(Unix)) that somehow, still manages to survive in the 21st century.
I have pretty basic needs from my desktop. I do 99% of my work using just three programs: a terminal emulator, Emacs, and Firefox. I don't want a lot of bells and whistles in my desktop, and I really just want it to get out of the way so I can do my work.
Most undergraduate computer sciences courses teach students about tail call optimization (TCO) , and even if you don't have a formal computer science background the concept is talked about enough that you might be familiar with it anyway, especially if you've ever done any functional programming. However, I think the…
I really like C++. It's not the right tool for every job, but it's what I reach for when I need to do any kind of systems programming. Unfortunately, C++ has often been cited as a "bad" language, and I feel like that reputation has worsened over time. Recent languages like Go and Rust have taken over a lot of mind…
I am generally a fan of Go's approach to concurrency: writing code with goroutines is a lot easier than writing traditional nonblocking network servers in a language like C or C++. However, while working on a highly concurrent network proxy I came across an interesting realization about how the Go concurrency model…
Most C programmers also know to avoid the legacy strcpy() and strcat() functions, as these commonly introduce buffer-overflow problems. Instead, C programmers should use the newer strncpy() and strncat() functions, which check the size of the buffer they're copying data into.
If you've ever look at the disassembly output for C or C++ code, you'll probably notice that there are a lot of push/pop instructions. And if you pay close enough attention, you'll notice that the compiler prefers to use certain registers over others. In particular, compilers will prefer pushing "old" registers like…