The dir method gives you entries in the directory you pass. If you don't
pass a test it'll use the default test which is none(".", ".."), i.e.
"anything except . and ..".
I'm not sure why using { .IO.d } as the test would not give you b,
though. Can you check what "a/b".IO.d outputs? Maybe that
Hello,
I think that I don't understand how the 'test' argument of 'dir' works.
I have a directory 'a', which contains a subdirectory 'b' and a file 'c'; I
want to select only the subdirectories of 'a'.
Using the REPL I tried to ask the content of the directory 'a':
> my @dirs = dir('a')
