šŸ‘‹ hi, Iā€™m basile

Speccing = cool - weeknotes #54

I’ve been working about 50% this week as I’m chaperoning the little one in her introduction to the new daycare centre. Which means that I spent my mornings with a group of about a dozen 2-6 year olds ā€“ a relatively different bunch than my regular colleagues, believe me.

I won’t bore you with parental softness, but it’s a really sweet thing seeing her navigating this new world and having so much to take on, from the new everyday language (šŸ‡«šŸ‡·) to the many rules of this new, strange place.


I’ve gladly welcomed (tautology?) the opportunity to work on some UI bits through tools nudging towards the isolation and “statelessness” of components.

On the JS, React side I’m leaning on Storybook once again and… still loving it so far.

It’s a bit more involved in ClojureScript, as I didn’t find the courage to set up the plumbing for devcards. Instead, Niko and I scaffolded a one-page view where I can toss my components and rather manually recreate their state.


For obscure large-company-German-IT reasons, the question of knowledge bases for a small team has come up. It’s something I’d like to get my thoughts in order about, as I’ve been using a few systems in the last few years, including as a now-floating agent.

TL;DR: where I used to favour dev-integrated tools (reference a PR/issue seamlessly), I’ve come to favour autosaved, WYSIWYG, great UI-X ones.


I’ve discovered Clojure Spec, part of the standard library, which assists the spec-ing and confirmity checking of data structures.

In a simplified form, it works this way:

Let’s define a post, which is a map/object containing, at least, type, author, and copy and at most the aforementioned plus media and location:

(s/def ::post (s/keys :req-un [::type
                               ::author
                               ::copy]
                      :opt-un [::media
                               ::location]))

Is this map valid? Nope…

(s/valid? ::post
          {:type "text"
           :author "basile"})
=> false

Why? explain-data points at the missing keyword:

(s/explain-data ::post {:type "text"
                        :author "basile"})
=> #:spec{:problems
          ({:path [],
            :pred (clojure.core/fn [%] (clojure.core/contains? % :copy)),
            :val {:type "text", :author "basile"},
            :via [:spec-demo.core/post],
            :in []}), :spec :spec-demo.core/post,
          :value {:type "text", :author "basile"}}