The gentle and a-lot-working David Simcha has converted one of my bug reports into an enhancement request: http://d.puremagic.com/issues/show_bug.cgi?id=4264
Currently (SVN) only array() is able to digest iterables that define opApply only, but I think a few more spread support will be very good. In the thread of that 4264 there are plenty of comments and views of the situation. Opinions welcome, both here and there. Bye, bearophile