The problem you are seeing is because inside the #map block you don't reference
the project root variable as an instance variable, but as a local variable.
Hence the error “undefined local variable or method `theProjectRoot'” :)
If you change the block like this, all should be good:
map {|f| @theProjectRoot.stringByAppendingPathComponent(f) }
On Jan 27, 2011, at 10:18 AM, Martin Hawkins wrote:
> I find the following behaviour a little bizarre:
> At the macirb prompt (0.8)
> fileManager = NSFileManager.defaultManager
> @theProjectRoot = '/Users/martin/work/macruby/lots_of_files'
> => "/Users/martin/work/macruby/lots_of_files"
>>> filenames = fileManager.contentsOfDirectoryAtPath(@theProjectRoot,
>>> error:nil).map {|f| theProjectRoot.stringByAppendingPathComponent(f) }
> NameError: undefined local variable or method `theProjectRoot' for
> main:TopLevel
>
> If I create a local variable with the name theProjectRoot, then the
> statement runs correctly. According to the documentation,
> NSFileManager.defaultManager.contentsOfDirectoryAtPath requires a
> string; the scope of the variable should be irrelevant, shouldn't it?
>
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> MacRuby-devel@lists.macosforge.org
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