Clojurians Log v2

Morning! Taking various trains and detours in order to get to zwolle

At least the snow covered landscapes are pretty

@hobosarefriends Whatcha doing in Zwolle?

The zwolle kvk had available appointments for this month unlike any of the nearer ones

morning!

style question: how do you feel about mixing threading macros? e.g.

(-> lots-of-maps
    (->> (filter beautiful-things)
         (sort-by :very-important-key))
    first
    :actual-important-key
    (or meaningful-default))

I fear them

I feel like my data structure is bad if I have to use them 😅

No concrete reason tho

I guess you can optimize your data shape for a given need, but in my case the same data is pulled from all sorts of direction so either I create N optimal views or I pull things from an almost always suboptimal shape

I do like reusing data structures :thinking_face:

In the previous example I would do filtering and sorting before passing it to the threading macro. But that's because of my aforementioned fear.

What if you give it a name (in a let block)?

lots-of-maps
    (->> (filter beautiful-things)
         (sort-by :very-important-key))

or maybe use this https://clojuredocs.org/clojure.core/as-%3E

I would try to avoid them, cause it operates on different contexts in “one place”, -> assumed to be used with assoc data and ->> with collections

my vote goes to let

also I feel like having or in threading macro is a bit confusing to read, maybe (get foo key default) is easier

Oh boy relevant post in #off-topic, a ->let

Now that we're on the topic of threading macros: https://gist.github.com/borkdude/93efc3f5978a2ed545553a47caaf7aa8

That confuses and scares me

Good, because you should just use let ;P

"Let over thread"

My code got called "very idiomatic" at an interview recently 😏

Still riding that high

The problem with the treading macro is the map is not always the first one. I was always kind of scared of the ->> but recently used

(->> (into (sorted-map) @transactions-by-iban)
       vals
       (remove empty?)
       (map last)
       vec))