From: listrecv@...
Date: 2006-03-27T15:38:54+09:00
Subject: Duck typing bunches of strings

In my quest to master the fine art of duck typing / overloading, I've
run into this probem:

How can I identify a collection?
The problem is: String mixes in Enumerable, although it ain't a
collection.

My method wants to act differently if it's given a collection, then if
it's just given a single object.  I would check .respond_to? :each -
but String does, unfortunately.

Currently, I'm forced to do .kind_of? Array - but this ain't duck
typing.

Any ideas?  I'd like to separate Array, Hash, Set, etc. etc. from
single member objects.