From: Ryan Davis Date: 2012-06-07T10:20:29+09:00 Subject: Re: Inexplicable Argument Error On Jun 6, 2012, at 13:38 , Doug Jolley wrote: > YIKES! I was not aware of that limitation. It certainly explains the > error message which had left me completely baffled. > > I substituted an _ for the = and everything works perfectly. I won't be > forgetting this real soon. Thanks so much. It'd be more idiomatic to rename the methods [] and []=.