I didn't quite understand the format spec and the difference between the '/' and ','.

However I figure that a hash table is the right idea. For your enjoyment and comments...

#!/usr/bin/perl -w
use strict;

my %name2team; #eg Phil  => Team1, Team4
my %team2name; #eg Team1 => Joe Phil Amenda

my $line= "";
while ($line = <DATA> )
{
   next if $line =~ /^\s+$/;      #skip blank lines
   
   $line =~ s/[=,\/\s+]/ /g;      #make spaced based tokens
   
   my ($team, @names) = split /\s+/, $line;
   
   foreach my $name (@names)
   {      
       push @{$name2team{$team}},$name; 
       push @{$team2name{$name}},$team;
   }   
}

foreach my $team (sort keys %name2team)
{
   print "$team has: @{$name2team{$team}}\n";
}

print "\n"; #just a spacer line

foreach my $name (sort keys %team2name)
{
   print "$name is on: @{$team2name{$name}}\n";
}

=output of the above:

Team1 has: Joe Phil Amenda
Team2 has: James Pam Joe
Team3 has: Carmen Lisa James
Team4 has: Don Phil Carmen
Team5 has: Uri Kate Don

Amenda is on: Team1
Carmen is on: Team3 Team4
Don is on: Team4 Team5
James is on: Team2 Team3
Joe is on: Team1 Team2
Kate is on: Team5
Lisa is on: Team3
Pam is on: Team2
Phil is on: Team1 Team4
Uri is on: Team5
=cut

__DATA__

Team1=Joe / Phil , Amenda
Team2  =  James / Pam, Joe
Team3= Carmen , Lisa / James
Team4=Don , Phil / Carmen
Team5=Uri , Kate / Don

[download]

In reply to Re: Matching problem by Marshall
in thread Matching problem by jo26

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.