Am i correct in summarizing the logic as you want to include the image of latest date that is on or before the given date? I think you have the general idea, though no need to read in an array .. just loop backwards with a date module (Date::Calc or any of the others) and check if that file exists. Something like (warning -- untested): 
use Date::Calc qw/ Today Delta_Days Add_Delta_Days /;
my ($start_date, $end_date) = ('2005-04-25', '2005-05-05');
my @target_date = Today();
my @start_date = split /-/, $start_date;
my @end_date = split /-/, $end_date;
die "not in range" unless Delta_Days(@start_date, @target_date)>=0 && 
+Delta_Days(@target_date, @end_date)>=0;
die "bad order" unless Delta_Days(@start_date,@end_date)>=0;
my @d = @target_date;
my $filename = '';
while( Delta_Days(@start_date,@d)>=0 ){
  my $f = sprintf "%04d-%02d-%02d.jpg", @d;
  if( -f $f ){
    $filename = $f;
    last;
  }
  @d = Add_Delta_Days(@d, -1);
}
print "File: $filename";

[download]

In reply to Re: Displaying a Image based on date range by davidrw
in thread Displaying a Image based on date range by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.