I want to replace the value of one hash with the value of a second hash when there is a match value(hash1)- key(hash2). 
my %hash1 = (
700200 => '523235',
700204 => '523221',
);

my %hash2 = (
523235 => 'Title1',
523221 => 'Title2',
);

[download]
#Result: ideally the change will happen in hash1, but 
my $value1;
foreach my $key1 (keys(%hash1)) {
  $value1 = $hash1{key1};
  foreach my $key2 (keys (%hash2)) {
    if ($value1 eq $key2){
    $hash3{$key1}= $hash2{$key2};
   }
  }
 }

print Dumper \%hash3;

#this should be the expected result
$VAR1 = {
700200 => 'Title1',
700204 => 'Title2',
};

[download]
My code does not work at all, only return an empty hash
any help? Thanks!

In reply to Replace the value of a hash 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.