Let me add that REPL based workflow is great when you can't write unit tests for whatever reason, you can test each bit of code in the REPL as you write it. Th

Let me add that REPL based workflow is great when you can't write unit tests for whatever reason, you can test each bit of code in the REPL as you write it. The more functional the language and your code, the more sure you can be that your informal testing will stay valid. The more your data is immutable, the easier that testing can be. If you grok it, with some practice it can work very well. I would be surprised if it couldn't work well for livecoding for some people.