* Types and Generics: Return type annotations, Variance, Type aliases, Implicits * Collections: Hierarchy, Use, Style, Performance, Java Collections * Concurrency: Futures, Collections * Control structures: Recursion, Returns, for loops and comprehensions, require and assert * Functional programming: Case classes as algebraic data types, Options, Pattern matching, Partial functions, Destructuring... more* Types and Generics: Return type annotations, Variance, Type aliases, Implicits * Collections: Hierarchy, Use, Style, Performance, Java Collections * Concurrency: Futures, Collections * Control structures: Recursion, Returns, for loops and comprehensions, require and assert * Functional programming: Case classes as algebraic data types, Options, Pattern matching, Partial functions, Destructuring bindings, Lazyness, Call by name, flatMap * Object oriented programming: Dependency injection, Traits, Visibility, Structural typing * Garbage collection * Java compatibility * Twitter’s standard libraries: Futures, Offer/Broker * Acknowledgments view page