sure
Output

i want 2 arrays based on the row that is in the while atm one shoud contain @a=('2302') the other shoud contain @b=('2304(3-8, 92-99)', '2305(2, 4-9)')
this is what i need on row basis

kd ultibuzz

Split isn't going to get your far on this. What you need is a good regex. Try this:

while ( my $line = <DATA>){
  my( @a, @b );
  my ( $junk, $useful ) = split /\;/, $line;
  my @elements = $useful =~ m/
    (\d+      # some numbers
     (?:      # followed by (don't capture)
      \(.*?\) # other stuff (non-greedy) in parens
     )?       # (optionally)
    )         # end capture
      /smxg;

  for my $element ( @elements ){
    if ( $element =~ /\(.*\)/ ){
      push @b, $element;
    }
    else{
      push @a, $element;
    }
  }
  # do something with @a and @b
}

__DATA__
2302.1;2302, 2304(3-8, 92-99), 2305(2, 4-9)
231.1;2301, 2303, 2304(1, 2, 90, 91), 2305(1, 3), 2306, 2307, 2308
[download]

I'm sure you could do this more compactly, but I didn't take the time to optimize. The first RE does the split you're looking for, followed by a check for each item to see if it contains parens.

perl -e 'split//,q{john hurl, pest caretaker}and(map{print @_[$_]}(joi
+n(q{},map{sprintf(qq{%010u},$_)}(2**2*307*4993,5*101*641*5261,7*59*79
+*36997,13*17*71*45131,3**2*67*89*167*181))=~/\d{2}/g));'
[download]

works great, but i need to say that i don't understand this regex thingy ;)
still nub in regex and learning allday

thx alot
kd ultibuzz