So i consider to insert the above lines...

Sounds like a good example of those little not-entirely-hypothetical problems you were looking for recently ;)

Kidding aside... I think your learning progress would benefit most from first trying yourself — in particular your heuristic skills of how to approach a problem (yeah, asking on PerlMonks right away could be considered a good heuristic skill, too (it's efficient in that it often gives you a solution within minutes), but I think you know what I mean... :)  You can always come back here in case you should get stuck.