META-PROGRAMMING TALK

• Intro (15 min)
  • What is Ruby?
  • What is Metaprogramming
• Metaprogramming Overview
  • Why it's cool
  • Examples of Metaprogramming solving problems
  • Why it's better than traditional methods of acheiving goals
  • Simple Code Examples
  • Gems/Examples in Rails that use Metaprogramming that you may not realize
• Bad Meta Programming
  • As you can see...
    • Metaprogramming is awesome
    • You can probably imagine some nefarious scenarios
  • 3 Deadly Sin Functions
    • send() with a section on fixing
    • constantize() with a section on fixing
    • eval() with a section on fixing
    • IN all examples be sure to include an example function, what it does, and why it's bad news
• Disclaimer
  • not dogging on Rails or Ruby, but because it's so versatile/powerful, need to be careful
  • Open for Questions
  • Thanks and Close

*Open Source Gems with Meta-programming Issues *Diaspora (constantize) *Discourse (send) *Fat Free CRM (constantize) *Redmine (const_get) *Spree (send, constantize)