Wow, you guys are totally awesome. My first post (albeit lame) has got me so many great tricks and tips. Reading the map function initially from the camel book was a little overwhelming for me. But your usage in an example below has started my brain to make some sense out of it. Another valuable and code shortening gem you have offered is

push @{ $hash{ $data[0] }{ $data[1] } } => "$data[2]: $data[3]";
[download]

Thank you so much!