@gmorpheme: I didn’t now about mapcat…

@gmorpheme: anyway, you’re right coord-list is much more simple with a for loop

(def files ["a" "b" "c" "d" "e" "f" "g" "h”])
(def coord-list
  (for [rank (range 8 0 -1) 
         file files]
    (keyword (str file rank))))

today I’m going to do some refactoring

Cool!

cool! I often find that I go first for something cunning with map, filter et al but for ends up giving a much neater simpler expression

similarly - I always worry if I end up reaching for flatten. More often than not it means I’ve lost track of the nesting going on and the rest of the expression is complicated enough that it’s blown my mental stack. Usually a signal that I’ve gone a bit too far down the wrong track.

sorry I only had time for a superficial glance through

@gmorpheme: core.typed helps me with keeping the nested structures handeable

sveri: Haven't used it myself, but it seems like prismatic schema is nice for this as well.

Might be a bit less intrusive and can also be applied gradually.

Jessica Kerrs talk on schema and gradual typing is worth its weight in gold.

Which might not be much, I mean, how much does a youtube video actually weigh

https://www.youtube.com/watch?v=GFQqyXoL0YQ

@slipset: I was tinkering between prismatic and core.typed a few times. What I like more about core.typed that it's a "compile time" check, not interfering with the runtime (not sure about prismatic though, I never really dived into it). However, I guess both do the job fine. Especially when coming back to a code base after a few days/weeks/months and you see the param "foo-m" which means it's a map with, yea, what is foo, ah, go back to that function, oh, there is a foo-m param too, goddamnit, what was that 😄

btw. core.typed should get gradual typing too, IIRC

AFAIK, you can switch schema on and off.

http://stackoverflow.com/questions/25710012/global-flag-to-turn-on-off-validation-in-prismatic-schema

asked and answered by @borkdude

OTOH core.typed reminds me of haskell, having a bit of a geek factor 😄, but thanks, nice to know that