Produce PHP-style multidimensional array, e.g arr[1][2][3] = 'foobar'

marray.rb

# Produce PHP-style multidimensional array.
#
# Example
#
# arr = Marray.new
#
# arr[1][2][3] = "foo"
# => "foo"
#
# arr[1][2][3]
# => "foo"
class Marray < Array
  def [](i)
    super.nil? ? self[i] = Marray.new : super
  end
end