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 <rice.gu...@gmail.com> 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 elm-discuss+unsubscr...@googlegroups.com. > 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 elm-discuss+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
