Hi, I need something like this. I have file with numbers for example:
1 2 4 25 39 48
1 2 3 4 39
2 3 48
1 2 4 8 12
5 10 11 12 13
6
7 9
...
and I need to read first line and take all numbers in the 1st line (1,2,4,25,39,48) and save all the numbers in the 1,2,4,25,39 and 48 line.
So i will have (1,2,4,25,39,48,2,3,4,39,4,8,12), then i need remove duplicate items so i will have (1,2,3,4,8,12,25,39,48) and read others numbers in lines (1,2,3,4,8,12,25,39,48) and so on until i read all numbers in refers lines.
Then i need read remaining lines like (5,10,11,12,13) and (7,9) and do the same recursion with other lines. I write something like this:

while(my $line = <LIST>)
{
    chomp $line;
    push @array, $line;
}

for (my $i=0; $i<396; $i++)
{
@new_array=();
@numbers=();
if(exists $hash{$i})
{
    print OUT1 "$i\n";
}
else 
{
     @new_array=split('\s', $array[$i]);
     foreach my $el(@new_array)
     {
          chomp $el;
          push @numbers, split('\s+', $array[$el-1]);
     }
@numbers= uniq(@numbers);
@numbers= sort @numbers;
$new[$i]=@numbers;
foreach my $arg(@numbers)
{
     print OUT "$arg\n";
     $hash{$arg}=$arg;
}
}
}

sub uniq {
    return keys %{{ map { $_ => 1 } @_ }};
}

[download]

but i dont know how to set some recursion to do it right. Any idea? Thank you. Daniel

In reply to I need help with some recursion by ragnarokPP

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