Not a dumb question at all, just one of those "Ruby-isms" that will take some adjusting to if you're coming from a C/C++/Obj-C background. In Ruby, Constants always start with a Capital letter. Therefore, all of the kFooBarBaz constants from Cocoa get translated as KFooBarBaz. Actually, that's got me thinking that we should maybe compile a list of the "cultural" differences between Obj-C and Ruby. I tried to sort of touch on it by pointing out Obj-C's tendency to CamelCase in place of Ruby's under_case, but I'm sure we can think of more of these transition-gotchas? - Josh On Oct 28, 2009, at 2:31 AM, Allison Newman wrote:
I'm probably asking a really dumb question here - but I haven't used bridgesupport very much... Is there a reason why the constant in the example that fails starts with an upper case K, rather than keeping the lower case k given in the framework?
Alli
On Wednesday, October 28, 2009, at 01:31AM, "Laurent Sansonetti" <lsansonetti@apple.com
wrote: Hi Alan,
I'm afraid the MD* APIs haven't been covered by BridgeSupport yet, so it may not be possible to call it directly from MacRuby at this point. I would recommend to file a bug at http://bugreporter.apple.com so that we can consider this for a future Mac OS X release, and to wrap this C API into an Objective-C class that you can call from MacRuby in the meantime.
Laurent
On Oct 27, 2009, at 5:13 PM, Alan Skipp wrote:
Would anyone be able to give me a hint on how to get the following objective-c code working with macruby. The code uses spotlight to extract metadata from a file.
MDItemRef inspectedRef = MDItemCreate(kCFAllocatorDefault,(CFStringRef)path); CFArrayRef attributeNames = MDItemCopyAttributeNames(inspectedRef);
NSLog(@"%@", (NSArray*)attributeNames);
I was hoping that including the 'CoreServices' framework would work, but no joy.
framework 'CoreServices' => true item = MDItemCreate(KCFAllocatorDefault, '/Users/alan/Desktop/ test.jpg') NameError: uninitialized constant KCFAllocatorDefault from core:in `const_missing:' from (irb):2:in `<main>' from core:in `eval:' from core:in `evaluate:' -- Alan Skipp al_skipp@fastmail.fm
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