use strict;
use warnings;

my $string = "1:1,2:1,3:2,500:2,505:1";
my (@array, %hash);


$string =~ s/(\d+):(\d+)(?:,|$)/$hash{$1}=$2;push(@array, $1)/ge;

use Data::Dumper;

print Dumper(\@array, \%hash);

[download]
the e on the end of the s// tells perl to execute what's on the right hand side and the g tells it to match the left hand side as many times as possible. So you effectively end up with the code on the right in a loop over all the things that match the pattern.

The (?:,|$) makes sure that the pair of number si followed by a , or that we're at the end of the string.

One thing to note is that this will destroy the contents of $string.

In reply to Re: better way to convert a string into an array and an hash by fergal
in thread better way to convert a string into an array and an hash by Miguel

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.