Today, we will look at a brain teaser:
Design a function f() that operates on whole numbers, such that f(x) = y and f(y) = -x. Or, more succintly, f(f(x)) = -x.
I will help you analyze the problem, and contribute my suggestion for a solution, along with an explanation of why it works.
Spoiler warning! You WILL learn an answer to this question. If you want a challenge, attempt to solve the problem before reading the rest of the post 🙂
If you’re anything like me, you quite often need to debug something network-related.
That’s all well and good, but without the proper tools, it can be a real hassle. One situation that you will often find yourself in, is connecting to a server speaking some protocol over SSL or TLS.
The problem is, you don’t speak crypto! Or do you?
Okay, bad pun asides, I’m going to show you a neat little zsh trick that significantly improves the whois output on Danish .dk domains.
I assume you already know zsh, which is objectively the most awesome unix shell in all of history. If you don’t, go get it now! Then come back here. Read more →
Hello World!
My name is Christian Iversen, and I’m a computer scientist, entrepreneur and all kinds of geeky.
On this blog, I’m going to post about things that interest me, which means that the content is going to be technical, and oriented towards all kinds of science. But above all, it should always be interesting. If I fail at that, kindly let me know 🙂
So in this first post I want to talk to you about the word “hacker”. Everybody knows what a hacker is, right? The kind of person who breaks into computer systems, wreaking havoc and ruining lives. Well, actually not.
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