Try using the following to create an alternation regex for your name rule:

my $regex = join '|', map "\Q$_\E?", @filelist;

my $find = File::Find::Rule
  ->file
  ->name(qr/^(?:$regex)$/)
  ->start( $dir );

while ( defined( my $html_document = $find->match ) ) {
    push @found_html, $html_document;
}

$f_count = scalar @found_html;

[download]

The generated regex:

1234567_3a_20101000\.html?|99877_b_20111111\.html?|99877_c_20111111\.h
+tml?|99877_d_20111111\.html?|99877_e_20111111\.html?|99877_uf_2011111
+1\.html?|1234567_g_20101000\.html?|99877_h_20111111\.html?|99877_i_20
+111111\.html?|99877_j_20111111\.html?|99877_k_20111111\.html?|99877_l
+l_20111111\.html?|1234567_pl_20101000\.html?|99877_qa_20111111\.html?
+|99877_rr_20111111\.html?|99877_sx_20111111\.html?|99877_xy_20111111\
+.html?|99877_nm_20111111\.html?

[download]

Since you've established a regex name rule, you don't need to check the results of $find->match, as it's using that rule.

Edit: Have updated the regex, based upon kennethk's comments.

In reply to Re: Search array of file names in directory structure by Kenosis
in thread Search array of file names in directory structure by Anonymous Monk

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