Choroba what if I dont want those lines which dont have a group (from the group hash) to be "even" printed ? For example a line which has relation : E.E.E.P.Pl doesnt have a corresponding key-value pair in the group hash, so I would like this complete row to not even get printed. I guess something has to be added in this line   print " , ", $path_string, ', ', $group{$path_string};

In reply to Re^10: constructing a tree from csv file by zing
in thread constructing a tree from csv file by zing

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