But the numbers presented are zero-padded integers, so the comparison is equivalent. If the numeric comparator were used with the simple split, a non-numeric comparison warning will be thrown (he does have warnings on, right?). Not all files listed have the .jpg file extension, so (split /_|\./, $a)[-2] won't work. I was also trying to keep it short/simple, preventing a long code block and making it easier for the OP to build his own. The best I came up with for using the numeric comparator sorted based upon the last block of digits: 

my $re = qr/\d+/;
print join "\n", sort {($a =~ /$re/g)[-1] <=> ($b =~ /$re/g)[-1]; } @n
+ames

[download]

But then I'd have to link to perlretut and Regexp Quote Like Operators as well...

In reply to Re^3: Sorting filenames with custom function by kennethk
in thread Sorting filenames with custom function by Anonymous Monk

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