@gonewest818 Yep, that's me. Not too many of us Upstills around.

I'm writing a library that deals with geometry and I did it all with points as maps with :x :y keywords. this has some advantages as other types can use point functions but the library works and I'm refactoring it and wondering how strongly I should feel about doing something like deftype or defrecord and how to think about this vs other sins I may be comitting

@awerner32 How strongly do you feel about performance vs convenience?

Any behaviour difference between put! and >! in core.async other than put! can be attached with a callback and >! must be called inside a go block ?

@funyako.funyao156 callback will called when you put! something on channel(channel can have fixed size) and >! will stop execution of go block until something can be added

@funyako.funyao156 >! ends up calling put! so the differences are fairly minimal

>! is basically (call-cc (fn [k] (put! c val k))) if Clojure had cal-cc

Anyone familiar with cljs-http? I'm trying to use it, but no matter what method or url I use I end up getting a {:status 0, :success false}.

Seems it's not a library issue at all but to do with same-origin policy stuff in the browser.

are you seeing browser console messages about CORS headers?

Yep. Something about * while 'include'

I only realized I can actually look at the browser console about half an hour ago, so that's the level I'm at when it comes to the web

@c09mld you are probably hitting this: https://github.com/r0man/cljs-http/issues/112

i was baffled by that status 0 return too

I’m wondering how good or bad idea is to use alter-var-root function to “decorate” my functions with metrics logic . I mean , if enabled ( collecting some metrics ) I will replace the root-var of some functions with my metric logic and all the code remains the same

I am new to spec. Is there a way to spec a function that expects an Atom?

(def arg1 (atom ""))

(defn some-func 
    [arg1]
    ...)

(some-func arg1)

@tkjone you could spec that it is an (partial instance? clojure.lang.Atom). Unless you want to spec the contents of the atom. Then, don’t. 🙂 Write a function that takes data, returns data; and another that derefs/swaps the atom to provide that data.

Thanks @pithyless

hello guys

I have 2 vectors and I need to calculate their mutual difference using clojure.data/diff

the problem I have is that I want to define equality for the elements of those arrays in a custom way

any suggestions?