Objective-Ruby? This is an attempt add type checking and more descriptive named parameters to ruby. This might make it in to Obvious at some point...

objective-ruby.rb

module ObjectiveRuby
  class << self
      def included(base)
        base.extend ClassMethods
      end
    end
 
  module ClassMethods
    def obj method, input = {}, &block 
       define_method(method)  do |method_input = {}| 
          block_input = {}
          method_input.each do |k,v| 
            new_key = k.to_s.sub!(/(with_|and_)/, '').to_sym
            if input[new_key].nil? 
              raise ArgumentError.new "invalid input field #{k}"
            end 
            unless v.is_a? input[new_key]
              raise ArgumentError.new "invalid type for #{new_key} expected #{input[new_key]}"
            end 
            block_input[new_key] = v
          end
   
          block.call block_input 
        end
    end

    def objr method, input = {}, &block 
       define_method(method)  do |method_input = {}| 
          block_input = {}
          method_input.each do |k,v| 
            if input[k].nil? 
              raise ArgumentError.new "invalid input field #{k}"
            end 
            unless v.is_a? input[k][1]
              raise ArgumentError.new "invalid type for #{new_key} expected #{input[new_key]}"
            end 
            block_input[input[k][0]] = v
          end
   
          block.call block_input 
        end
    end
  end
end
 
class Foo 
  include ObjectiveRuby

  @stuff = 12
 
  obj :execute, foo: String, bar: Fixnum  do |input|
    puts "foo: #{input[:foo]}"
    puts "bar: #{input[:bar]}"
    puts "stuff: #{@stuff}"
  end

  obj :fun do
    puts 'fun!' 
  end

  objr :test, with_foo: [:foo, String], before_when?: [:some_time, String] do |input|
    puts "foo: #{input[:foo]}"
    puts "some time: #{input[:some_time]}"
  end

end
 
 
f = Foo.new
f.test with_foo: 'hi', before_when?: 'now'
f.execute with_foo: 'hi', and_bar: 1
f.fun #this is pointless, but fun
#f.execute with_foo: 'hi' # this will fail with nil
#f.execute with_foo: nil, and_bar: 1 # this will fail with nil

This experiment has officially begot the gem 'objective-ruby' - https://rubygems.org/gems/objective-ruby