Re: [Rubycocoa-talk] Pointer arguments to Obj-C methods

[Hans-Georg <pan...@ma...>]

Am 14.04.2008 um 21:52 schrieb Hans-Georg:

> is_directory =  
> OSX::NSFileManager.defaultManager.fileExistsAtPath_isDirectory?("/ 
> usr/local/bin/")

I didn't run that code, obviously. This method will return two values:

exists, is_directory =  
OSX::NSFileManager.defaultManager.fileExistsAtPath_isDirectory?("/usr/ 
local/bin/")
p exists, is_directory
# true, 1

exists, is_directory =  
OSX::NSFileManager.defaultManager.fileExistsAtPath_isDirectory?("/usr/ 
local/bin/gnuplot")
p exists, is_directory
# true, 0

Only the first returned value is a boolean (which seems to be a bug,  
because in Ruby "0" is not false, but true). So you have to check for  
an existing directory like this:

if exists && is_directory == 1
	#...
end

Hans-Georg