object-invoke.rb

# Challenge:
#  change foo(bar) into bar.foo
#

# Why this is hard:
#  method foo is a method of self, which we wouldnt
#  have access to from within any method we create


class Object
  def invoke(scope, method)
    scope.instance_eval { send(method, self) }
  end
end

#=> foo(bar) becomes bar.invoke(self, :foo)

class Object
  def method_missing(method, *args, &block)
    if args.size == 1
      args.first.instance_eval { send(method, self) }
    else
      super
    end
  end
end

#=> foo(bar) becomes bar.foo(self)

# As an added bonus, we dont have to always pass 'self'.
# For instance, Time.parse(string) becomes string.parse(Time),
# which is kind of nifty.