Thanks for the explanation!
A December 30, 2020 3:28:24 PM UTC, Gianni Ceccarelli <dak...@thenautilus.net>
escreveu:
>On 2020-12-30 David Santiago <deman...@gmail.com> wrote:
>> Thanks! It's indeed much clearer. However i have a question, why the
>> react on line 24?
>>
>> The react there isn't required right?
>
>I think it is ☺ The code, without the debugging bits::
>
> react {
> whenever $channel -> $val {
> $conn.print("SENDING\r\n");
>
> react {
> whenever $conn-supply -> $line {
> if $line ~~ /^340/ {
> $conn.print("[$consumer]: value $val\r\n");
> } else {
> done;
> }
> }
> }
> }
> }
>
>I read this as:
>
>* loop as long as the channel has values, then exit
>* for each value in the channel:
> * write to the server
> * then loop reading from the server
> * and exit *this inner loop* when you get a non-340 line
>
>Without the second ``react``, that ``done`` would exit the first ``react``,
>essentially terminating the client. There's probably a way to write
>the whole thing differently (keeping more explicit state, probably).
>
>Also, my understanding of ``whenever`` is that it's adding a hook into
>the event loop, and only leaving the surrounding ``react`` (or
>``supply``) will remove that hook (people who understand this better
>than I do: please correct me!). If that's true, adding a hook many
>times on the same condition looks wrong to me…
>
>--
> Dakkar - <Mobilis in mobile>
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>
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