gistfile1.txt

#!/usr/bin/env ruby

class Test
  def self.hello(name)
    puts "hello #{name}"
  end

  def hello2(name)
    puts "hello #{name}"
  end

  def self.my_create_method(name)
    define_method(name) do
      yield "bar"
    end
  end
  
  #This works
  my_create_method(:foo) do |obj|
    self.hello(obj)
  end

  #This doesn't work
  my_create_method(:foo2) do |obj|
    hello2(obj)
  end
end

t = Test.new
t.foo  # "hello bar"
t.foo2 #=> testcase.rb:15:in `block in <class:Test>': undefined method `hello' for Test:Class (NoMethodError)