From: Robert Klemme <shortcutter@...>
Date: 2010-04-06T02:05:05+09:00
Subject: Re: When {integer:0} <> 0 ???

On 04/05/2010 05:13 PM, Jesús Gabriel y Galán wrote:
> On Mon, Apr 5, 2010 at 5:10 PM, Richard Fairbanks <lists@f-p-i.com> wrote:
>> Thank you, Jesús and Brian, that was what I needed!
>>
>> Please forgive me for my vast ignorance. I have learned so many
>> different Mac scripting languages over the years and all of them "have
>> left the choir invisible and are pushing up daisies." Thus I had no
>> choice but to learn AppleScript.  ;-)
>>
>> I am THRILLED that Ruby looks like a keeper! and I apologize again for
>> my extreme Ruby "noobieness."
> 
> No need to apologize. As I read sometimes in this list (I think it's
> Robert Klemme who usually says this) we all started as newbies at some
> point :-)

I couldn't agree more. ;-)

Just one additional bit of information: the syntax with the colon is not 
supported any more in 1.9.1:

robert@fussel:~$ ruby -vc x.rb
ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux]
x.rb:7: warning: unused literal ignored
Syntax OK
robert@fussel:~$ ruby19 -vc x.rb
ruby 1.9.1p376 (2009-12-07 revision 26041) [i686-linux]
x.rb:7: syntax error, unexpected ':', expecting keyword_then or ';' or '\n'
if p(Y.z): 0  # I assume this is the culprit!
           ^
x.rb:7: warning: unused literal ignored
x.rb:9: syntax error, unexpected keyword_end, expecting $end
robert@fussel:~$ cat -n x.rb
      1	require "appscript"; include Appscript
      2	require 'osax'; include OSAX
      3	
      4	module Y; def self.z; 0; end; end
      5	osax.say(Y.z)    #=> "zero"
      6	
      7	if p(Y.z): 0  # I assume this is the culprit!
      8	  osax.say(Y.z)    #=> silence
      9	end
     10	
     11	osax.set_the_clipboard_to(Y.z)    #=> {integer:0}
     12	
robert@fussel:~$

Brian is absolutely right: the colon in this place is used so rarely 
that I even had forgotten about it.  While we're at it, let's check 
another usage:

robert@fussel:~$ ruby -vce 'case x; when 1: puts true else puts false end'
ruby 1.8.7 (2009-06-12 patchlevel 174) [i486-linux]
Syntax OK
robert@fussel:~$ ruby19 -vce 'case x; when 1: puts true else puts false end'
ruby 1.9.1p376 (2009-12-07 revision 26041) [i686-linux]
-e:1: syntax error, unexpected ':', expecting keyword_then or ',' or ';' 
or '\n'
case x; when 1: puts true else puts false end
                ^
robert@fussel:~$

Aha, colon disappeared with "when" as well.

Kind regards

	robert



-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/