opendir doesnt NEED an or die.
$ perl -wMstrict -le 'opendir FOO, "/FOOBAR"; my @x = readdir FOO'
readdir() attempted on invalid dirhandle FOO at -e line 1.
Also, what if the directory is inaccessible, etc... debugging code that doesn't check opendir et al for errors isn't fun. (Note autodie can be useful in addition to Use strict and warnings.)
I'm guessing that he ... entered them correctly. ... I nver trust user input, I try to check it where I can.
?
The regular expression is there in case there are any blank lines in the directory.txt file
Just that the regex will also skip files named, for example, 0_0. Probably better to just check the length.
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