I'd argue that method_missing isn't metaprogramming at all. What about ActiveRec...

cubicle67 on May 12, 2012 | parent | context | favorite | on: Automatic programming: write code that writes code

I'd argue that method_missing isn't metaprogramming at all.

What about ActiveRecord (Rails' default ORM)? That makes great use of code-writing-code to generate a ton of methods on your class all based on db fields.