Plurrrr

I'm a fan of the unzip command line utility that ships with macOS. I give it a .zip file and it unzips it for me. No flags or arguments to remember (for my typical usages anyway). Most importantly, I've fully internalized the unzip command into muscle memory, probably because of its perfect mnemonic.

When I was learning Java in college, I did not understand the use for interfaces. You can't define functions inside an interface. You can only declare them. You have to have a class implement the interface to define it's functions and then use them. That's crazy! Pretty worthless piece of crap I would think. I can just write my classes and their functions normally. Why would I declare them in one place and define in another. I don't even need to declare them. Just write my functions normally in a class. It's totally redundant.

Many topics in cryptography on this blog so far, but not many basic topics. This post is a crack at providing such an approach. With luck, it should bring utility to unfamiliar folk, but also grins for folk familiar with this art.