> There have been a couple of times where I wanted to understand how an interesting library or bit of code worked, so I printed the code out and made notes righ

> There have been a couple of times where I wanted to understand how an interesting library or bit of code worked, so I printed the code out and made notes right on the page as I read through it. I do this as well, although I usually get a page or two in, figure out what the code does, and regret printing out the rest. Still worth doing, but I need to train myself to waste less paper.