Just as #add:before: raises an exception when the second arg is not in  
the collection (indirectly, since #find: does not find the second arg)  
add:beforeIndex: should raise an exception if there is no valid index  
given as the second arg. Though to be honest I really don't think  
OrderedCollection should even implement add:beforeIndex: &  
add:afterIndex:. It's just.... yuck. All the usages I can spot are  
simply poor algorithms that ought to be done properly.

tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Oxymorons: Act naturally