There are many editor plugins/configs which will allow you to evaluate code from inside your editor. For instance, I use tmux/Vim/Vim Slime, which allows me to

There are many editor plugins/configs which will allow you to evaluate code from inside your editor. For instance, I use tmux/Vim/Vim Slime, which allows me to send code from the editor to the REPL (running in a separate tmux pane). This setup isn't as embedded or as fancy as some of the other options (e.g. Light Table). However, this setup doesn't force me to break my standard workflow and works with other languages which offer a repl or interactive console (e.g. Scheme/Racket, Ruby, Haskell, JS, etc.).