I think you're going to want %food_combining to have specific food type as keys, and groups as values, so you can look up the group name (or number, however you decide to store it) for whatever foods you are given. Unfortunately for your intent, that's just a single-level hash.

Then you've got the rules for combining groups. You could do that with an AoA or HoH (depending on whether you did group numbers or names). Your indexes would be two groups, and the value would be Yes or No (or you could just index the Yes values, and if there's no value, it's No). Be sure to index things in both orders: [1][3] == [3][1].

Caution: Contents may have been coded under pressure.

In reply to Re: Continuing from "Turning foreach into map?" - perlreftut and References by Roy Johnson
in thread Continuing from "Turning foreach into map?" - perlreftut and References by ghenry

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.