Introducing Fir, the Friendly, Interactive Ruby REPL Posted on January 23rd, 2018 I haven’t been posting here much because most of my free time has been spent working on a ruby REPL that I call Fir, which stands for friendly-interactive-ruby. The ruby community has no shortage of great REPL’s — the default irb is pretty good, and pry offers a fantastic repl as well as an interactive debugger that