[MacRuby-devel] Bizarre behaviour with an instance variable

[Martin Hawkins]

Yes - a 1.9 change; 'parameters to a block are now always local to a
block' - I'll probably forget again before it sticks.

On Jan 27, 9:44 am, Eloy Durán <eloy.de.en... at gmail.com> wrote:
> 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?
>
> > _______________________________________________
> > MacRuby-devel mailing list
> > MacRuby-de... at lists.macosforge.org
> >http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>
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