roAssociativeArray Count

Hi Gang,

Hopefully simple question, how do you get a count on items in a roAssociativeArray? I’ve tried a couple things, but not getting it.

Thanks!
Bud

aa={one:"asdf",two:"wfwee",three:"asdfefef",four:"asefefe"}

z=0:for each object in aa:z=z+1:next:?z