auto_initializer.rb

module AutoInitializer
  def initialize(*args, **opts, &blk)
    opts.each do |k,v|
      instance_variable_set(“@#{k}”, v)
    end
    super if defined? super
  end
end
  
# Usage
class Foo
  attr_reader :bar
  include AutoInitializer
end
  
puts Foo.new(bar: true).bar
# => true