[MacRuby-devel] I tried converting a working script rubycocoa script to macruby and it failed on this line...

[Tim Rand]

Thanks Vincent,
You're suggestion fixed the script. The top line is the original rubycocoa
line and the line below the macruby equivalent. It would be nice to add such
an example to the tutorial at
http://www.macruby.org/trac/wiki/MacRubyTutorial (please kind maintainer--if
you are listening). It is not obvious that macruby would require quotes and
a trailing colon when passing the name of a selector/method. I don't think
there are any examples that cover this rule currently.
Thanks,
Tim

 center.addObserver_selector_name_object(self, :next_number, "next number",
"com.imasender") #rubycocoa
 center.addObserver self, selector: "next_number:", name: "next number",
object: "com.imasender" #macruby

On Fri, Dec 12, 2008 at 7:00 AM, <macruby-devel-request at lists.macosforge.org
> wrote:

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>   1. I tried converting a working script rubycocoa     script to
>      macruby and it failed on this line... (Tim Rand)
>   2. Re: I tried converting a working script rubycocoa script to
>      macruby and it failed on this line... (Vincent Isambart)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 11 Dec 2008 21:55:04 -0800
> From: "Tim Rand" <timrandg at gmail.com>
> Subject: [MacRuby-devel] I tried converting a working script rubycocoa
>        script to macruby and it failed on this line...
> To: macruby-devel at lists.macosforge.org
> Message-ID:
>        <ea8cb0bb0812112155q3c4873f1q3627a8227477eec9 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> NSDistributedNotificationCenter.defaultCenter.addObserver_selector_name_object(self,
> :next_number, "next number", "com.imasender") #Working RubyCocoa line
>
>    NSDistributedNotificationCenter.defaultCenter.addObserver self,
> selector: :next_number, name: "next number", object: "com.imasender" #But
> gives the error below when converted to MacRuby grammer and run with
> macruby.
>
> 2008-12-11 21:45:43.448 macruby[66187:10b] *** -[Receiver next_number]:
> unrecognized selector sent to instance 0x1319720
> receiver.rb:29:in `run': NSInvalidArgumentException: *** -[Receiver
> next_number]: unrecognized selector sent to instance 0x1319720
> (RuntimeError)
>    from receiver.rb:29:in `<main>'
>
> It's driving me crazy. If the statement is a correct translation from
> RubyCocoa to MacRuby syntax why am I getting a "unrecognized selector sent
> to..." error?
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> ------------------------------
>
> Message: 2
> Date: Fri, 12 Dec 2008 15:05:18 +0900
> From: "Vincent Isambart" <vincent.isambart at gmail.com>
> Subject: Re: [MacRuby-devel] I tried converting a working script
>        rubycocoa       script to macruby and it failed on this line...
> To: "MacRuby development discussions."
>        <macruby-devel at lists.macosforge.org>
> Message-ID:
>        <7d9a1f530812112205w6bf0ed95h745b9f980bf0ad90 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi,
>
> >     NSDistributedNotificationCenter.defaultCenter.addObserver self,
> > selector: :next_number, name: "next number", object: "com.imasender" #But
> > gives the error below when converted to MacRuby grammer and run with
> > macruby.
> >
> > It's driving me crazy. If the statement is a correct translation from
> > RubyCocoa to MacRuby syntax why am I getting a "unrecognized selector
> sent
> > to..." error?
>
> I think your selector should not be :next_number but 'next_number:'
> (note the ':' at the end). Every method that has a parameter should
> have its selector ending with a ':' in MacRuby.
>
> Cheers,
> Vincent
>
>
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> End of MacRuby-devel Digest, Vol 10, Issue 17
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