From your comments, it sounds like you're unhappy with this loop? 

# here is where I messed up for the query. I cannot control this loop.
# it finds the things but fails to print them only once. 

foreach $1 (sort keys %file1){
    foreach my $position1 (@{$file1{$1}}){
        $found =0;
        foreach $contig_id(sort keys %hash_1){
            foreach my $position (@{$hash_1{$contig_id}}){
                $found = 1 if $1 =~ /^$contig_id/ && $contig_id=~ /^$1
+/ && $position1==$position;
                print RESULTS "$position1\t$1\n" if $found;

                print "not matched\n" if !$found;
            }
        }
    }
}

[download]
What I can't understand from either your description OR your code is what you intend to happen here.

As it's written, $found gets set to 0 only in the middle foreach loop, so if it's ever set to 1 in the inner loop, it'll remain 1 for all the rest of the inner loop iterations. Is that what you want?

Try to explain clearly what you want this loop to do, both to yourself and to us. Odds are that explaining it to yourself will be enough for you to figure out a better way to code it, but if it isn't, we're here to help...


Mike

In reply to Re: Hash - Compare - Multiple value keys by RMGir
in thread Hash - Compare - Multiple value keys by sesemin

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.