Oops, obviously I meant #(dispatch ...)
On Fri, 3 Apr 2015 at 12:53 Daniel Kersten <[email protected]> wrote:
> The queues are FIFO since it's using core.async under the hood. Obviously
> if you have things like server putting events on the queue, you can't
> guarantee order, but relative order (eg doing two dispatches one after
> another) will be in order.
>
> Yeah, I'd probably do with something like:
>
> (let [player (subscribe [:active-player])]
> (fn []
> [:div {:on-click (dispatch [:do-something @player])} ...]))
>
> That is, have the event control which player it gets applied to. This way
> the handler does not need any knowledge of this at all and can use path
> middleware to focus in on only what it cares about (the game board, in the
> case of selecting a cell).
>
> On Fri, 3 Apr 2015 at 12:46 Rafał Cieślak <[email protected]> wrote:
>
>> > I would also triple check that the order in which events are dispatched
>> are the order in which they are executed.
>>
>> I was worried about it, too, but re-frame docs explain it quite clear.
>>
>> https://github.com/Day8/re-frame#talking-to-a-server
>>
>> > dispatch will cause a handler function to be called. But the process is
>> async. The call is queued.
>> > if you (further) dispatch in a handler, then that will be async too.
>> The associated handler is queued for later processing. Why? Partially
>> because handlers are given a snapshot of the app-db and can't be nested.
>>
>> Problems can show up later in case I'd be doing some async operations
>> like saving to local storage or making HTTP requests – I wouldn't be able
>> to guarantee the order in which they get queued.
>>
>> So yeah, the pureness of the second approach has many benefits and makes
>> the code more confident.
>>
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>
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