Seems my prompt was too obscure. See if this makes sense:

use constant DATE_TEMPLATE => "file_name_%4d%02d";

sub buildEm{ 
    my $year = shift; 
    my @dates = sprintf DATE_TEMPLATE", $year-1, 12; 
    push @dates, sprintf DATE_TEMPLATE, $year,   $_ for 1 .. 11; 
    return \@dates;
};;

$dates = buildEm( substr localtime, -4 );;

print for @{ $dates };;
file_name_201212
file_name_201301
file_name_201302
file_name_201303
file_name_201304
file_name_201305
file_name_201306
file_name_201307
file_name_201308
file_name_201309
file_name_201310
file_name_201311

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In reply to Re^3: Year-month for file names by BrowserUk
in thread Year-month for file names by Anonymous Monk

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