Ruby pre-initialized struct

gistfile1.rb

class Basket < Struct.new(:entries)

  def self.new(*args)
    b = super(*args)
    b.entries ||= []
    b
  end

  def total
    entries.inject(0.0) do |sum, entry|
      sum += entry.subtotal
    end
  end

end

# This gives you the ability to pre-initialize a Struct object before doing anything else.