[Screencast] Handling Nil in Crystal

[stephendolan]

Thanks so much! In case it’s helpful reference material, here’s everything I could find on the topic on the forums and official GitHub repos while researching for the video:

• Is casting the idiomatic way of dealing with nil?
• Nil check for instance variables · Issue #4475 · crystal-lang/crystal · GitHub
• Immutable instance variables · Issue #4359 · crystal-lang/crystal · GitHub