This week, Soroush talks Chris through his efforts to make an improvement to the Swift standard library.

• dropLast
• dropLast Implementation
• Soroush’s lazyDropLast Gist
• Ole Begemann: How to Read the Swift Standard Library Source
• Umberto Raimondi: A Short Swift GYB Tutorial
• Wikipedia: Circular Buffer
• Runtime: Command+F for the win!