Ruby & (Ampersand) Parameter Demystified skorks.com
Recently I was asked a question about ‘& parameters’ when you define and/or call methods which take a block. When do you put an ampersand in front of block variables and when do you not? It is often hard to remember how confusing Ruby can be when you’re starting out. So, let’s dig into this a little more deeply and shed some light on what’s going on.