gistfile1.rbx

  1 class Object
  2   # Returns a hash where the key is a message that this object
  3   # responds to and the value is the first object that responded
  4   # to that message.
  5   def first_responders
  6     methods_hash = {}
  7     self.class.instance_methods.each {|m| methods_hash[m] = self}
  8     self.class.ancestors.each do |ancestor|
  9       ancestor.instance_methods.each {|m| methods_hash[m] = ancestor}
 10     end
 11     methods_hash
 12   end
 13 end
 14 
 15 def dump_hash(hash)
 16   dump = "{\n"
 17   hash.each_pair do |key, value|
 18     dump << "#{key.inspect} => #{value.inspect}\n"
 19   end
 20   dump << "}"
 21 end
 22 
 23 puts "'abc'.first_reponders => #{dump_hash('abc'.first_responders)}"