slack-ruby-client VS schema

Ah, I'm surprised Slack doesn't support Ruby, but to be fair they are pretty tight on official support with only Python, Node and Java.

Fortunately there's https://github.com/slack-ruby/slack-ruby-client, but it's not official. Although it seems to be a good example of a community driven library coming together. I haven't used it personally (I never interfaced with Slack in a Ruby app) but at a glance it looks like it has really good docs, a decent amount of contributors, well maintained, etc.. If I were building some Rails app that used Slack I'd likely reach for this and not feel bad about it.

Kind of a bummer on the other 2 tho. Thankfully I wouldn't be building too many apps using those tools, but I get the point you're saying. In the grand scheme of things I think this also shows at how much more popular Python is than Ruby.

Slack's Ruby client works well and is well organized: https://github.com/slack-ruby/slack-ruby-client

Plumatic schema (https://github.com/plumatic/schema) , or friends I might be wrong, but I think schema might make more sense to you coming from the F# world (might be wrong)

This one? I didn't. I hear good things about it, and it's reached a point of maturity, being widely used in production.

Uhhh spec has existed for a long time and before that, schema Nowadays we also have the excellent malli. If his codebase is full of functions where the shape of the data isn’t obvious, isn’t documented and isn’t specified in a specific/schema, that’s on him and his bad coding practices and really no different from passing data in other dynamic languages. A class by itself (without additional effort) only gives you field names.

I don't understand this reputation either. There are very large systems built on other Lisps. For example, Emacs has a massive amount of Elisp. Elisp is much more primitive than Clojure, and traditionally libraries don't use e.g. data schemas [1] as runtime contracts for data.

Obviously, once a system built on top of a dynamic language grows beyond certain threshold, you need to be very disciplined as there are no static types to ensure some degree of correctness.

[1] https://github.com/plumatic/schema

Try to learn a schema library early, like Malli or Prismatic Schema. Do not mistook them as "static-typing" things - it's more for data validation and coercion than "security that things will get the right typing information". The idea to learn them early is how you'll shape future code: validating all "output data" first, them using that data inside your program without "defensive programming" like checking every time if a specific value on a map is nil, etc

In Clojure, declarative data specifications for validation and generation are also very mainstream. Schema was first out the door, Clojure Spec is the most popular library, while malli is gaining popularity fast at the moment.