split

# File activesupport/lib/active_support/core_ext/array/grouping.rb, line 41
        def split(value = nil, &block)
          block ||= Proc.new { |e| e == value }
          inject([[]]) do |results, element|
            if block.call(element)
              results << []
            else
              results.last << element
            end
            results
          end
        end