Ill give you that is compact!

But I think, that

• my @files = map { "$dir/$_" } grep { !/^\.{1,2}\z/ && -f "$dir/$_" } @tmp;

is both compact but very clear and readable. On the otherhand,

• map {$d="$dir/$_";$r= -d $d?\@dirs:\@files;push @$r,$d;} grep {!/^\./} readdir DIR;

is compact and clever but not easily readable IMHO.

On the other hand, I really like your use of the ternary and references. I would not have thought of using it like that. ++ ++ I think that is quite clever. Thanks for the snippet of code.

Only one complaint, the way you wrote you regex it will skip any dot file. So .my-file would not be picked up.

zzSPECTREz

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