Chapter 19 Closures and Iterators

• 19.1 Closures
• 19.2 Closures and the Fn traits
• 19.3 The Iterator trait
• 19.4 Iterator adapters
• 19.5 Consuming iterators
• 19.6 For loops, demystified
• 19.7 Loops vs iterators
• 19.x Chapter 19 summary and quiz