If you don't need to use a while loop, you could get a list of all the directories using the File::Slurp read_dir function which by default ignores the special . and .. directories: 
use File::Slurp;
my @dirs = grep { -d "$oldFolder/$_" } read_dir($oldFolder);
print "$_\n" for @dirs;

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This approach is slightly different from yours in that it will not filter out other hidden directories, such as .foo.

In reply to Re: check if it is a file or directory by toolic
in thread check if it is a file or directory by saintex

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