Something like
@files = sort grep -f, map {opendir DIR, $_; readdir DIR} @dirlist;
? That's a little quick and dirty, since I don't closedir at all, and I don't check the return value of opendir. But it is kind of slick.
If perl had an operator (call it <,) that would execute both sides (left-to-right) and return the left side, then I could neatly do the map as
map { opendir DIR, $_; readdir DIR <, closedir DIR }
I think that would come in handy reasonably often.
Caution: Contents may have been coded under pressure.
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