You can't do what you want without looping, since every key needs to be visited. In fact, you need three loops. 

for every company
   for every employee of the company
   for every family member of the company

[download]

But yes, you can use grep to loop. 

my @companies = grep {  grep { $_ eq 'jim'  } @{$_->{EMPLOYEES}}
                     && grep { $_ eq 'bill' } @{$_->{FAMILY_MEMBERS}}
                     }
                keys %CompanyInfo;

[download]

In reply to Re: Searching hashes of hashes ... by ikegami
in thread Searching hashes of hashes ... by chenho

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.