split (ActiveSupport::CoreExtensions::Array::Grouping)

    # File lib/active_support/core_ext/array/grouping.rb, line 90
            def split(value = nil)
              using_block = block_given?

              inject([[]]) do |results, element|
                if (using_block && yield(element)) || (value == element)
                  results << []
                else
                  results.last << element
                end

                results
              end
            end