Hi,
How do I create a ruby class that has mass assignment functionality?  I
want it to work in a similar way to the way in which ActiveRecord does,
ie.
MyClass.new
=> #<MyClass:>
MyClass.new(:name => "Cool class")
=> #<MyClass: @name="s">
MyClass.new(:name => "Cool class", :other_attribute => "some other")
=> #<MyClass: @name="s", @other_attribute="some other">

I have found the following code snippit which works for the mass
assignment part but doesn't work if I initialize the class without any
arguments:

class MyClass
  attr_accessor :name
  attr_accessor :other_attribute

  def initialize(args)
    args.keys.each { |name| instance_variable_set "@" + name.to_s,
args[name] }
  end
end

MyClass.new
ArgumentError: wrong number of arguments (0 for 1)
        from (irb):19:in `initialize'
        from (irb):19:in `new'
        from (irb):19

What is the best way of achieving mass assignment whilst still allowing
to initialize without parameters?
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