Things you can do with Arrays!

Here are a few things you can do with Arrays.

Look at them, and play with them in irb. Don’t necessarily try to memorize all of them… you can always look things up in the documentation when you actually need these. It might be useful if you’ve seen some of them before though.

Funnily, you can "calculate" with Arrays. Remember set theory from your math classes? This is pretty similar. ...