i have two hashes each of them contains an array for each key

No you don't.

First, there are no arrays anywhere in that code. Just lots of meaningless parens.

Secondly, hash values must be scalars, and arrays aren't scalars. You could store a reference to an array in a hash value, though. 

my %genome1 = (
   a => [ 10, 15 ],
   b => [  3,  7 ],
   c => [  9, 14 ],
);

my %genome2 = (
   d => [  3, 21 ],
   a => [  3,  4 ],
   g => [  5, 10 ],
   b => [  2,  7 ],
);

for (keys(%genome1)) {
   if ($genome2{$_}) {
      print("Both genomes have key $_\n");
   }
}

[download]

In reply to Re: array in hashes by ikegami
in thread array in hashes by persianswallow

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.