How about using a reference to an array. Here's a little ditty that builds the kind of hash for which you're looking and then prints out the results:

use strict; use warnings; use diagnostics; use Data::Dumper; my %hash; my $key; my $value; my @data = ("foo",1, "bar",2, "foo",3, "baz",4); while ($key = shift (@data)) { $value = shift (@data); # push the value on the array push @{$hash{$key}}, $value; } print Dumper \%hash;

Note: you have to create the anonymous reference -- you can't just push a value if the key doesn't exist.

Update: apparently you can just push the value.


In reply to Re: multiple values for one key in hash by wade
in thread multiple values for one key in hash by sovixi

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, 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, 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.