Thank you for the quick response, 

that encourages me in using ruby now that i noticed that the danger of
destructive block variable naming (remember <i> vs. |i| ?) in practice
really is not so serious.

I realized meanwhile that i stumbled over something different (see my
2nd post).

That is OpenSource service!
-- 
Fritz Heinrichmeyer mailto:fritz.heinrichmeyer / fernuni-hagen.de
FernUniversitaet Hagen, LG ES, 58084 Hagen (Germany)
tel:+49 2331/987-1166 fax:987-355 http://www-es.fernuni-hagen.de/~jfh