Hi, this is how I did it: https://www.reddit.com/r/elm/comments/5wikog/easy_questions_beginners_thread_week_of_20170227/deeptz3/ The answer starting with: "My app is also small, it has now 3 pages. It's model looks like…".
And this a similar queston with complex answer from Richard Feldman: https://www.reddit.com/r/elm/comments/5jd2xn/how_to_structure_elm_with_multiple_models/ The answer starting with: "Here's my general advice." Regards, Witold Szczerba On Wed, Mar 8, 2017 at 4:17 AM, Alex Rice <[email protected]> wrote: > Hi all, I am new to Elm, and functional programming, and have been reading > through all the docs and tutorials. One question that keeps cropping up for > me is: > > How do you break up the Msg union type and the update function into > logical, manageable and editable pieces in a large Elm project? > > type Msg = > many | things > > and > > update : Msg -> Model -> ( Model, Cmd Msg ) = > case msg of all... those.. things > > So the pattern is, the Msg is a union type of many things, and the update > function is similarly lengthy case statement. > > How does that scale in real web apps? What if you have 100 messages, then > the update function is always 100 cases long? In the the scenario where you > are using Navigation.program, then shouldn't the update function only be > testing the cases which are in scope for the current route of the SPA, not > all 100 cases? In the Navigation.program examples I have seen, all the > cases are evaluated. > > I hope there is a way to decompose the messages and the update function > perhaps using some kind of pattern matching, or by some FP techniques, I > just have not seen it yet. Looking forward to hearing what you think! > > -- > You received this message because you are subscribed to the Google Groups > "Elm Discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Elm Discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
