Hi,
I am looking at:
https://github.com/evancz/elm-architecture-tutorial/blob/master/examples/6-clock.elm
… and trying to figure out what's going on there. The official guide does
not cover this, I guess it's because it's a work in progress for 0.17.
So, there is:
subscriptions : Model -> Sub Msg
subscriptions model =
Time.every second Tick
and the subscription is "picked" by
Html.program's
{ ..., subscriptions: subscriptions ... }
That part seems easy: "someone" (aka the Html Framework) just fires the
thing and the timer begins to tick. So far so good, but I was wondering
what Time.every is… The Time.elm starts like this:
effect module Time where { subscription = MySub } exposing […]
What does "effect module" mean? I tried to find this in
http://elm-lang.org/docs (Syntax, Package Design), but it's not there. Is
it something so new it's just not there yet or I can't find it? What does
it mean? Is it something very special, part of Elm's syntax, or is it just
an instance of some template/generic kind of module?
Thanks,
Witold Szczerba
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