Other developers have different styles of developing. I have a REPL open in a tmux tab all day every day, and pipe snippets to it from vim to test how stuff wor

Other developers have different styles of developing. I have a REPL open in a tmux tab all day every day, and pipe snippets to it from vim to test how stuff works. When I was working with Java there were times I wanted that: just a quick way to verify behavior. I'm currently working with Ruby, and for me the REPL help me work faster because I can play with the code in parrallel to writing the tests or implementation code.