Thank you for the reply. When I put the print command at the end of the file, all the duplicates are still there. My original code had this snippet at the end: 

open(my $fh1, '>', $SCAC_output) ;
foreach (@output) {
    print $fh1 "$_ \n ";
}
close $fh1 ;

[download]

The $SCAC_output file (defined elsewhere in the code) has a bunch of duplicate file references from the array. The reason I ended up putting the print statement inside the while loop (along with the sleep command) was to try to understand better what part of the code causes duplicates in the array.

In reply to Re^4: Why does this code continue to loop? by rachard11
in thread Why does this code continue to loop? by rachard11

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.