Ruby: Module, Mixins and Blocks confusing?

Question

Following is the code I tried to run from the Ruby Programming Book http://www.ruby-doc.org/docs/ProgrammingRuby/html/tut_modules.html

Why doesn\'t the

Answer 1

Since that code example was written, Array has gained a #product method and you're seeing the output of that particular method. Rename your module's method to something like product_new.