Summing Stuff

I needed to sum up some shopping expenses. It looked like a problem that should have already been solved, so using a search engine I stumbled upon this Stack-Overflow question’s answers. I’ve found it really smart and simple, so I thought to write something in here. The answers are pretty good explaining in details how the thing works, and of course you can always use man to know more about a program you don’t know, especially with standard commands like cut or paste. Read more