final && is great!

hate to disappoint you, i see some op-precedence problems on other suggestions:

• $_?$n=$L[$_-1]:p&&last   doesn't work cause "&&" is higher than "?:"
• int($_=p)/($0=p),$_%$0   is wrong, needed "int" of "/" not vice versa
• w($_=getc)?ord:-1   is wrong, needed "w" of "?:" not vice versa