From: Kent Dahl <kentda+news@...>
Date: 2004-06-06T21:33:39+09:00
Subject: Re: How to ducktype a Hash?

Nathan Weston wrote:
> How about using the fetch and store methods? These work the same as
> Hash#[] and Hash#[]=, but are unique to Hash.

ObjectSpace.each_object(Module){|m| p m if m.instance_methods.include? 
"fetch" }

Both Hash and Array have fetch, apparently only Hash has store.

For other potentially unique candidates:

--------------&<--------------
target = Hash
methods = target.instance_methods

classes = []
ObjectSpace.each_object(Module){|c| classes << c }
classes.delete target

classes.each{|c| methods -= c.instance_methods }
puts methods.size, methods

=begin
$ ruby unique_interface.rb
15
value?
to_hash
merge!
merge
store
default
default=
default_proc
invert
has_key?
each_value
update
has_value?
rehash
each_key
=end
--------------&<--------------

-- 
(\[ Kent Dahl ]/)_    _~_    _____[ http://www.pvv.org/~kentda/ ]_____/~
  ))\_student_/((  \__d L b__/     Master of Science in Technology     )
( \__\_�|�_/__/ ) _)  Industrial economics and technology management (
  \____/_�_\____/ (____engineering.discipline_=_Computer::Technology___)