While hunting bugs caused by changes in Ruby tonight, I was surprised  y this:

$ ruby_dev -ve 'p %w[A B C].each_with_index.to_a'
ruby 1.9.0 (2007-12-25 revision 0) [i686-darwin9.1.0]
["A", "B", "C"]

That kept my usual each_with_index.map { } trick from working.  Is  his intentional?