[MacRuby-devel] Translating Obj-C to MacRuby

B. Ohr jazzbox at 7zz.de
Wed Oct 14 02:10:19 PDT 2009

Hi John,

Am 14.10.2009 um 10:34 schrieb John Shea:

> Hi Bernd,
> YES and NO in ObjC are translated to true and false in MacRuby.
> so you were probably after:
>  NSNumber.numberWithBool(false)
> (I am curious as to how often that is useful actually)
> I will leave the table idea for others to comment - I actually think  
> in the end there are only a few rules to learn and then you will  
> find yourself translating easily (not that those rules should not go  
> in a cheat sheet somewhere - that's probably a good idea).

Shure, there are only few rules, but:

1. there are newbies outside (most of the Obj-C programmers)

2. why should I manually correct those Obj-C things like [aObj: foo] a  
thousand times when it can easily be done by a regexp? I don't want a  
real translator, I am wanting just a simple []-remover!

> With:
> NSDictionary.dictionaryWithObjectsAndKeys "a", "b", nil
> I assume that in the original ObjC method is actually passing an  
> array which (it seems) must be terminated by a nil (in objC).
> I actually ran across this in another context - passing objects in  
> this way - again I will leave others to comment on it, perhaps it is  
> an issue.
> However why can't you use :
> dict = {"b"=>"a"}
> => {"b"=>"a"}
> #check class of created dictionary
> dict.class
> => NSMutableDictionary
> Why use the long winded ObjC form?

Perhaps you misunderstood me. I know this already and I don't want to  
use the long form, I just typed that in macirb to use the RESULT (in  
this case {"b"=>"a"}). Perhaps this is the way a Obj-C programmer is  
trying out MacRuby because of lacking of documentation.


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