Clojure is notorious for it’s REPL driven development: https://www.youtube.com/results?search_query=clojure+repl+driven+development OCaml has “opam utop”, but I’m having trouble finding people describing their “OCaml Repl Workflow” === I want to define “Repl based development” not as “occasionall…

[image] zeroexcuses: I want to define “Repl based development” not as “occasionally use the REPL”, but something like this: we start a REPL we type code in some editor, and continuously “send last expression” to the REPL, and we look at the new output eventually, we clean up the buffer a bit a…

I don’t use Clojure so can’t compare the experience. But I would say OCaml’s REPL experience is amazing. Assuming you are using dune as your build tool, you can type dune utop to start a new REPL session where you can experience with your own code. But aside from Utop, which fits inside a terminal,…

Do you use Emacs? People often write Emacs functions by: firing up blah.el writing short snippets of code, hitting C-x C-e to evaluate last expr eventually building the code they need This is in contrast, to say C++ where one generally writes more code, compiles less frequently, runs even less fr…

@ivg : Thank you for the detailed response. I don’t understand half the issues going on, but they sound precisely like the type of issues one runs into with reloading in a single persistent REPL. If anyone has a similar workflow using either VIM or IntelliJ, I’d love to hear those too. Thanks!

[image] ivg: #trace find_best_student;; This looks useful. Thanks.

@ivg : This is greedy on my part: Some time ago, I saw http://www.parens-of-the-dead.com/e1.html which demonstrated the power of REPL driven development in Clojure. Is there any chance you can make a short 10-15 minute video of you hacking on toy projects / demoing your setup? (Bonus points if som…

There is always a chance :slight_smile: I will keep this request in my todo list, so that as soon as I will get some free time I would probably do this.

[image] ivg: Well, this is exactly how I’m developing my code every day, and the style that I’m trying to promote. I’m using Emacs as my editor of choice, If 20 people watch the 15 min video, the amortized cost / promotion is only 45 seconds. :slight_smile:

I do something similar in vim using a plugin, briefly described here . I also use custom printers to render trees – but this is all ascii art.

I use Vim and entr. ‘Save’ file and entr executes ‘ocaml’ in another terminal. Look forward to hearing about how to use Vim and ‘send last expression’

Happy to see that I am not the only one who likes bottom up development. :slight_smile:

OCaml REPL Driven Development?

Learning

smolkaj July 25, 2019, 4:18pm 15

It’s also worth noting that Down just landed, a really promising alternative to utop in my opinion.

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OCaml REPL Driven Development?

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