--- singleton_method_added(name)

    ðۥ᥽åɤɲä줿˥󥿥ץ꥿ƤӽФޤ
    name ˤɲä줿᥽å̾ Symbol Ϥޤ

        class Foo
          def singleton_method_added(name)
            puts "singleton method \"#{name}\" was added"
          end
        end

        obj = Foo.new
        def obj.foo
        end

        => singleton method "foo" was added

    ̾Υ᥽åɤɲäФեåˤ
    Module#method_added [Module/method_added]Ȥޤ

