It should work on both. What exactly is going wrong?

You can test a filehandle or a filename with the -d file test operator, which returns true if the file is a directory, false if not, and undefined if the file was not found: 
for $x ("windows", "sheep", "etc") {
  if (-d $x) { print "Found directory: $x\n"; }
}

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In reply to Re: directories by turnstep
in thread directories by jrsmith

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