optional_block_args.rb

# Using optional arguments, with a default value for "two"
define_method :method_name do |required, *optional|
  # one, two, = *optional
  one, two, *ignored = *optional
  # two will have a default value
  two ||= "Default value"
  
  # ...
end
 
# With an options hash, with default values for the options
define_method :method_name do |required, *options|
  default_options = { :foobar => "default value }
  options = (options.first || Hash.new).merge(default_options)
  foobar = options[:foobar]
 
  ...
end