How to memoize a class method with META PROGRAMMING?

How to memoize a class method with META PROGRAMMING?

References

Reference NO 1

http://www.jimmycuadra.com/posts/metaprogramming-ruby-class-eval-and-instance-eval

Reference NO 2

http://ruby-metaprogramming.rubylearning.com/html/ruby_metaprogramming_3.html

Reference NO 3

http://www.sitepoint.com/hitchhikers-guide-to-metaprogramming-classmodule-hooks/

Reference NO 4

http://tapestry.apache.org/meta-programming-page-content.html

Reference NO 5

http://www.vitarara.org/cms/ruby_metaprogamming_declaratively_adding_methods_to_a_class

Reference NO 6

http://www.packtpub.com/article/metaprogramming-and-groovy-mop

Reference NO 7

http://hackingbit.com/tag/metaprogramming/

Reference NO 8

http://yehudakatz.com/2009/11/15/metaprogramming-in-ruby-its-all-about-the-self/