is there any way to “merge” two map generators?

I guess you can cheat your way into it with (s/gen (s/merge x y))

well, I don’t have specs for the maps I need to merge (so it’s not strictly a spec question!)

(gen/let {m1 gen-m1, m2 gen-m2} (merge m1 m2))

oh there’s gen/let!

that’s great, thanks @gfredericks!

hello everyone, how can i validate a month inside a string? is the regexp approach the best? it should be a string containing 2 digits ranging from “01” to “12"

it's certainly easy as a regex #"0[1-9]|1[0-2]"

thx

(into #{} (map #(format "%02d" %)) (range 1 13))

Then with clojure.spec you can do something like (s/def ::month-number-str (into #{} (map #(format "%02d" %)) (range 1 13))). And/or just write it out like so:

(s/def month-number-str
  #{"01" "02" "03" ...}

I'd like to generate a spec dynamically, where the name of the spec is returned from a function. Is there any prior art on this?

(defn register-spec
  [spec-k attr-ks]
  (s/def (keyword "foo" spec-k) (s/keys :req-un attr-ks)))

like this

@creese I'm not sure it's a good idea or that it'd work as expected, but the spec registry is an atom you can swap! etc.