Storable makes this much easier than Data::Dumper. Here's a sample using Data::Dumper: 
#!/usr/bin/perl -w
use Data::Dumper;
my %hash = ('foo' => 'bar',
         'camel' => 'beast',
         'bug' => 'spray');
#dump the structure
open (FILE, '>/tmp/hash') or die "$!\n";
print FILE Dumper(\%hash);
close FILE;

#recreate the structure
open (FILE,'/tmp/hash') or die "$!\n";
my $data = do { local $/; <FILE> };
my %newhash = %{eval $data};

[download]
And here's the same thing with Storable: 
use Storable;
store \%hash, '/tmp/hash';
my %newhash = %{retrieve('file')};

[download]


BlueLines

Disclaimer: This post may contain inaccurate information, be habit forming, cause atomic warfare between peaceful countries, speed up male pattern baldness, interfere with your cable reception, exile you from certain third world countries, ruin your marriage, and generally spoil your day. No batteries included, no strings attached, your mileage may vary.

In reply to Re: Re: References and state-saving by BlueLines
in thread References and state-saving by Guildenstern

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.