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In the closing keynote titled *You Gotta Try This* at the LoneStarRuby Conf 2013, speaker Avdi Grimm presents an engaging exploration of meta programming in Ruby and the joys of coding. The primary focus is on his toolkit for building null object classes in Ruby, which enhances coding efficiency and developer happiness.

Key Points:
- **Introduction to Null Objects:** Avdi explains the null object pattern and its purpose—simplifying code by implementing a dummy object that responds to method calls without performing any actions. This allows developers to eliminate repetitive checks for object presence.
- **Benefits of the Toolkit:** Although creating a null object class can be achieved without a library, Avdi emphasizes that his toolkit simplifies this process, making it easier to implement variations of the pattern.
- **Variety in Null Object Patterns:** He introduces advanced concepts like a black hole IO object, which facilitates method chaining, and a traceable null object for debugging scenarios.
- **Joy in Coding:** Avdi shares personal anecdotes highlighting the transformative influence of Ruby on his coding journey, comparing his early cubicle life with the vibrant Ruby community. He reflects on the thrill of meta programming and how certain music can evoke profound emotions akin to coding joy.
- **Pair Programming Initiative:** He advocates for pair programming as a means of sharing joy and enhancing community engagement, encouraging attendees to connect with new partners and promote collaborative coding practices.
- **Interface Subsetting in Code:** Avdi discusses the importance of tailoring interfaces in his toolkit, illustrating how to filter methods for a specific use case sequentially.

Conclusions:
- Avdi encourages attendees to seek joy in their coding practices, highlighting that frequent engagement with enjoyable programming activities fosters greater effectiveness.
- He emphasizes the importance of sharing joy within the community, concluding with a call to action for participants to connect through caring cards to facilitate pair programming opportunities. Avdi’s dynamic presentation underscored the importance of community, joy, and the continued exploration of Ruby's meta programming capabilities, aiming to inspire the audience to find and share their coding passion.

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