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RubyConf 2019 - Tales of the Ruby Grimoire by Brandon Weaver There are arts best left unspoken, dark magics left forgotten and locked away in the deepest vaults of the Ruby language, lest they be seen by mortal eyes not ready for the horrors inside. That is, until a particularly curious Lemur named Red happened to open it. Journey with Red into the Tales of the Ruby Grimoire, through parts of the language not meant for the faint of heart. There is great power here, but that power comes at a cost. Are you willing to pay it? #confreaks #rubyconf2019
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In the talk "Tales of the Ruby Grimoire" presented by Brandon Weaver at RubyConf 2019, the speaker uses a whimsical story featuring a curious lemur named Red to explore advanced programming concepts in Ruby. The narrative unfolds as Red discovers the mythical Ruby Grimoire, a book containing powerful and intricate knowledge about Ruby that is not typically accessible to novice programmers. **Key Points Discussed:** - **Introduction of the Main Character:** Red, a young lemur, begins his journey of discovery under the guidance of his master, Scarlet. - **Exploration of Knowledge:** Intrigued by legends surrounding a secret door leading to forbidden knowledge, Red opens the door to find the Grimoire and the Dark Lord Crimson, who offers lessons that delve into advanced programming paradigms and tricks in Ruby. - **Lessons from Scala:** The session highlights placeholder arguments and closures as features drawn from Scala's programming model, enriching Ruby's flexibility and power. Red learns about closures and how they can be used in Ruby through a playful and educational dialogue with Crimson. - **JavaScript Insights:** The story transitions to the realm of JavaScript, where Red learns about destructuring, a feature that simplifies variable extraction from objects, and the concept of punning, which offers new syntax possibilities. - **Haskell Lenses:** The final segment presents concepts from Haskell such as lenses, which enable deep manipulation of data structures without mutation. Brandon emphasizes how lenses can be leveraged in Ruby, akin to existing methods like `dig`. - **Metaprogramming Dangers:** Throughout the talk, the speaker raises awareness of the potential pitfalls in metaprogramming, addressing common concerns around its complexity and misuse, while acknowledging its power. - **Concluding Thoughts:** The narrative leverages humor and imaginative storytelling to engage the audience while reinforcing the idea that with great power comes responsibility. Weaver concludes the talk encouraging experimentation and exploration of the Ruby language, as the knowledge learned today might become standard practice tomorrow, underscoring the importance of understanding the implications and costs associated with advanced programming techniques.
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