Hi Monks,

I have a directories A, B, etc that contain dated subfolders in chronological order (YYYYMMDD format) and I am using glob to find ONLY the subfolders in the future. I cannot assume anything about the dates (i.e. how far into the past or future). This function, however, has become quite slow over time, so I am looking for a way to speed it up. I call this function quite often, so I'd like to make it as fast possible. I need to keep the history of dated folders, so deleting subfolders is NOT a solution.

It seems pointless to search through the entire history when I just need the future dates, so I'm looking for a way to glob ONLY the future dates. Maybe I can use readdir instead of glob in some smart way?

Below is a simplified version of my code. I apologize for any mistakes !! 

###################################################
## folders + dated subfolders There are many !!

## A/<date1> = past
## A/<date2> = future
## B/<date3> = past
## B/<date4> = future
## ..
## function needs to return [ <date2>,A and <date4>,B ]
###################################################

[download]
sub _isGoodFolder {
  my ($theDate,$datePlusFolder,$attr) = @_;
   my ($date) = ($datePlusFolder =~ /\/(\d{8})$/);

   if ($date > $theDate) {  ## compare folder date with today
    return $datePlusFolder;
   }
  return '';
}

my $today = new Date::Business->image;
my $dir = <basePath>;
my $cwd = Cwd::getCwd();
chdir($dir);
my @folderKeys = grep { _isGoodFolder($today,$_) } glob("*/*");
chdir($cwd);
return [ map { join ",",(split "\/")[1,0] } @folderKeys ];

[download]

In reply to smart glob of dated subfolders by Anonymous Monk

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