Hm, I realise that the use of devcards is very limited in this case, because re-frame puts all the logic into the dominos 2+3.

@gadfly361 I had a look at the re-frame-template +gadfly. Everything seems to be spread through a lot of files. Why did you choose to separate the code into so many different parts, add glue namespaces and so on?

Hi guys

i'm trying to use piechart from recharts with multiple colors but it don't change color for each segment it only fill with only color

oh

got it

i use Scatther rather than Cell

thanks anyway

@urzds Just how i think about things. I prefer the fractal approach when it comes to directory structure and files. Everything always has a home so you dont have to think about what to name things or where to place them and files will never get too large.

is there a good doc on the query vector to a subscription? is there any thing for parameterizing them? (eg. pulling a specific entry from an array?)

Can someone please point me to documentation that describes the difference between these variants of a reagent component?

(defn f []
  (let [x (re-frame/subscribe [:x]]
    (fn []
      ...)))

(defn f []
  (fn []
    (let [x (re-frame/subscribe [:x]]
      ...)))

I think my mistake was that I actually had (let [x (re-frame/subscribe [:x]) y @x] (fn [] ...)) and hence reagent would not see that x was being derefed inside the fn.

@urzds https://github.com/reagent-project/reagent/blob/master/doc/CreatingReagentComponents.md ?

But still: In which situation should I use which variant? Does it make a difference? Not sure where to find the docs on that.

the doc is on the reagent github 😉 afterall, re-frame is based on reagent

Thanks a lot for the link, that's very helpful!

Question is: Why should I put the subscribe in the form-2 variant's outer let, instead of just using a form-1 and putting the let inside?

there is also this discussion that could be interesting for you https://github.com/Day8/re-frame/issues/218

which eventually points to https://lambdaisland.com/blog/11-02-2017-re-frame-form-1-subscriptions

So is there any benefit of using form-2?

@urzds Form-2 can be useful when you need to create a stateful renderer (you need the renderer to close over some state)

(defn my-view      ;; Form-2
  [] 
  (let  [count   (reagent/ratom(0)]     ;;; capture some state 
    (fn []   
      [:div     <reset! count in response to a button click or something>  ])))

But you do NOT need to use Form-2 when using subscribe

All of which is to say that you rarely need to use Form-2 in re-frame.

@mikethompson Thanks!

I find myself using Form-3 quite a lot when dealing with forms (clear temp values from state on unmount and so on)

Not sure why the above mentioned article says you need the reagent/create-class only in 1% of the cases :thinking_face: am I not understanding something?