gistfile1.txt

Outside in configuration

class ObjectBuilder
  def initialize()
     someMoreDefaults = {}
  end

  def setFoo foo
    foo = foo
  end

  def setBar bar
    bar = bar
  end

  def setSomeMoreDefaults
    someMoreDefaults = someMoreDefaults
  end

  def build
    Object.new(foo, bar, someMoreDefaults, ...)
  end
end

Alternative inside out configuration

class Object
  def initialize(someAttribute, configureMe)
    self.someAttribute = someAttribute
    configureMe(self)
  end

  def doGreatWork
    "Yeah work"
  end
end