Re: What does this mean ?

Ok thank you very much for the help.

2016-02-17 16:54 GMT+01:00 Oliver Ruebenacker <[email protected]>:

> sounds right.
>
> On Wed, Feb 17, 2016 at 10:53 AM, Clement Dourval <[email protected]
> > wrote:
>
>> Ok I'm begining to understand :
>> the "ping ! Pong" is calling the '!' method and putting a Pong in a
>> mailbox.
>> And the fact that the other side is continuesly calling the receive
>> method is kind of forcing the scan of the mailbox as much as possible.
>> Then when the mailbox has a message in it, it feeds the message as
>> argument for the partial method
>> am i right ?
>>
>> Le mercredi 17 février 2016 16:22:41 UTC+1, Oliver Ruebenacker a écrit :
>>
>>>
>>>      Hello,
>>>
>>>   receive {...} is a call of the "receive" method and short for
>>> receive({...})
>>>
>>>      Best, Oliver
>>>
>>> On Wed, Feb 17, 2016 at 10:11 AM, Clement Dourval <[email protected]>
>>> wrote:
>>>
>>>> But what does the fact that the "receive" word is not followed by the
>>>> '=' sign is meaning ?
>>>> receive is suposed to be a function here right ?
>>>> is that a kind of averride without having to write the whole signature.
>>>>
>>>> From where i'm standing, it seems to me that receive is a function with
>>>> partial cases depending on the main argument to be Ping typed or other.
>>>>
>>>> But there is no = sign so what does this mean ?
>>>>
>>>> Le mercredi 17 février 2016 15:57:49 UTC+1, Oliver Ruebenacker a écrit :
>>>>
>>>>>
>>>>>      Hello,
>>>>>
>>>>>   The case keyword creates a partial function, e.g.:
>>>>>
>>>>> scala> val pf: Int => String = { case 42 => "Hello!" }
>>>>> pf: Int => String = <function1>
>>>>>
>>>>> scala> pf(42)
>>>>> res1: String = Hello!
>>>>>
>>>>>      Best, Oliver
>>>>>
>>>>> On Wed, Feb 17, 2016 at 9:40 AM, Clement Dourval <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Hi, I'm currently Learning Scala and more precisely, concurrent
>>>>>> programming with scala.
>>>>>>
>>>>>> I found this code :
>>>>>>
>>>>>> class Pong extends Actor {
>>>>>>   def act() {
>>>>>>     var pongCount = 0
>>>>>>     while (true) {
>>>>>>       receive {
>>>>>>         case Ping =>
>>>>>>           if (pongCount % 1000 == 0)
>>>>>>             Console.println("Pong: ping "+pongCount)
>>>>>>           sender ! Pong
>>>>>>           pongCount = pongCount + 1
>>>>>>         case Stop =>
>>>>>>           Console.println("Pong: stop")
>>>>>>           exit()
>>>>>>       }
>>>>>>     }
>>>>>>   }
>>>>>> }
>>>>>>
>>>>>> This is from a tutorial, so i'm expecting it to work, the only
>>>>>> problem is I do not understand how.
>>>>>>
>>>>>> The main problem is, how does this code use the case keyword since
>>>>>> there is no match !
>>>>>> (adress of the tutorial : http://www.scala-lang.org/old/node/242)
>>>>>>
>>>>>> Anyway, i understood what was the tutorial was supposed to do (with
>>>>>> ping pong), I just don't understand what is written, I'd like to be able to
>>>>>> write it myself.
>>>>>> But it seems i'm missing some syntax subtleties
>>>>>> And even if these are deprecated, i found the same synthax with the
>>>>>> akka Library ! So I'm asking myself how to read this.
>>>>>>
>>>>>> Anyone can help ? Thanks in advance !
>>>>>>
>>>>>> --
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Oliver Ruebenacker
>>>>> Senior Software Engineer, Diabetes Portal
>>>>> <http://www.type2diabetesgenetics.org/>, Broad Institute
>>>>> <http://www.broadinstitute.org/>
>>>>>
>>>>> --
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>>>
>>>
>>>
>>> --
>>> Oliver Ruebenacker
>>> Senior Software Engineer, Diabetes Portal
>>> <http://www.type2diabetesgenetics.org/>, Broad Institute
>>> <http://www.broadinstitute.org/>
>>>
>>> --
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>
>
>
> --
> Oliver Ruebenacker
> Senior Software Engineer, Diabetes Portal
> <http://www.type2diabetesgenetics.org/>, Broad Institute
> <http://www.broadinstitute.org/>
>
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