Here's another approach: 

c:\@Work\Perl\monks>perl -wMstrict -le
"print qq{perl version $]};
 ;;
 my @strings = (
   'Link:1625 housing Link:2004',
   'Link:638 92-5000|Link:63892-5070',
   );
 ;;
 my $rx_numeric = qr{ \d+ (?: - \d+)? }xms;
 ;;
 for my $str (@strings) {
   my @matches = $str =~ m{ Link : ($rx_numeric (?: \s+ $rx_numeric)?)
+ }xmsg;
   print qq{'$str' -> }, map qq{'$_' }, @matches;
   }
"
perl version 5.008009
'Link:1625 housing Link:2004' -> '1625' '2004'
'Link:638 92-5000|Link:63892-5070' -> '638 92-5000' '63892-5070'

[download]
Add the  /i modifier if you want case insensitive matching:
    my @matches = $str =~ m{ ... }xmsgi;
For  qr// see Regexp Quote-Like Operators in perlop. For  =~ see Binding Operators in perlop. See also perlre, perlretut, and perlrequick.

Update: I often find it prudent to add an extra element of safety by using boundary assertions in data field regexes. So  $rx_numeric might be better defined as (tested)
    my $rx_numeric = qr{ (?<! \d) \d+ (?: - \d+)? (?! \d) }xms;
See  (?<!pattern) (?!pattern) in Extended Patterns in perlre.

Give a man a fish:  <%-{-{-{-<

In reply to Re: Perl Regex by AnomalousMonk
in thread Perl Regex by audioboxer

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