Duck Type System? ( was: stereotyping...er...way too long :)

ruby-talk
1

a wrote:

how about simply

obj.respond_to? :read # => true

obj.respond_to? :read, IO # => true

obj.respond_to? :read, IO, Proc # => false

becomes

class Object
def respond_to?(meth, *signature)
# new stuff…
end
end

nice and backward compatible. easy to remember.

a good improvement to #respond_to? no doubt, and easily implemented.

but duck_signiture would actually insepect a method to determine the respond_to? requirements of its parameters, which is quite a different sort of beast.

in fact, i think this is a good CHALLENGE FOR ALL RUBYISTS! Implement #duck_signiture in pure Ruby. can you do it!? :wink:

if you become frustrated this is funny:

Dave Barry, humor columnist and author of Insane City

-t0