What you are describing sounds like a merge sort, and there is a module File::MergeSort designed for that. It takes a list of files at once along with a key extraction subroutine.

I'm sure there's a straightforward way to implement the getFilename operation, if only by tinkering with the File::MergeSort code. 

# Mostly extracted from the documentation.  I have not tried it.

use File::MergeSort;

my $sort = new File::MergeSort( 
   \@file_list, 
   \&index_extract_function 
);

my $line;
while (defined($line = $sort->next_line)) {
   my $fname = getFilename();
   print "$line/$fname\n";
}

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In reply to Re: Log parsing by timestamp dilema by tall_man
in thread Log parsing by timestamp dilema by Limbic~Region

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