Thanks Nabil! I was very uncertain about how to write this article. It is so hard to convey what REPL based development is like. Also I only know how I do it. It would've been really interesting to learn more about the process you use.

If I understand correctly, your deliverable product is JavaScript-based code? The Mathematica notebook is only used to prototype an experiment to figure out how to solve the problem? Or will the JavaScript code somehow call into this code?

You make me curious about this Wolfram language. If it is only used for prototyping, it must have some very nice properties? Do you have any kind of elevator pitch for the language? Some thing that sums up the benefits to someone familiar with other dynamic languages such as python, Ruby, JavaScript?