"Pete Goodeve" <pete / jwgibbs.cchem.berkeley.edu> wrote in message 
news:dv8lhf$18m$1 / jwgibbs.CChem.Berkeley.EDU...
> Not sure of the best way to do what I want -- maybe just use 'has_key?'
> and then do the right thing.

The question is what exactly are you trying to do?

    robert