This page contains automated test results for code from O'Reilly's Ruby Cookbook. If this code looks interesting or useful, you might want to buy the whole book.

Listing Methods Unique to an Object
CodeExpectedActual
class Object
  def my_methods_only
    my_super = self.class.superclass
    return my_super ? methods - my_super.instance_methods : methods
  end
end
s = ''
s.methods.size
 143 143 
Object.instance_methods.size
 41 41 
s.my_methods_only.size
 102 102 
(s.methods - Object.instance_methods).size
 102 102 
def s.singleton_method()
end
s.methods.size
 144 144 
s.my_methods_only.size
 103 103 
class Object
  def new_object_method
  end
end
s.methods.size
 145 145 
s.my_methods_only.size
 103 103 
class MyString < String
  def my_string_method
  end
end
MyString.new.my_methods_only
 ["my_string_method"] ["my_string_method"] 
class Object
  def my_methods_only_no_mixins
    m = my_methods_only
    self.class.ancestors.each do |ancestor| 
    m = m - ancestor.instance_methods unless ancestor.is_a?(Class) \
	 || ancestor == Kernel      
    end
    return m
  end  
end
[].methods.size
 121 121 
[].my_methods_only.size
 78 78 
[].my_methods_only_no_mixins.size
 57 57