Nytro Posted May 4, 2011 Report Posted May 4, 2011 Programming ScalaDean WamplerObject Mentor, Inc.<dean@deanwampler.com>Alex PayneTwitter, Inc.<alex@al3x.net>Copyright © 2008 O’Reilly MediaThis work has been released under the Creative Commons Attribution-Noncommercial.AbstractProgramming Scala introduces an exciting new language that offers all the benefits of a modern object model, functional programming, and an advanced type system. Packed with code examples, this comprehensive book teaches you how to be productive with Scala quickly, and explains what makes this language ideal for today's highly scalable, component-based applications that support concurrency and distribution. You'll also learn the advantages that Scala offers as a language for the Java Virtual Machine.Learn more at programmingscala.com or at the book's catalog page.Preface Welcome to Programming Scala Conventions Used in This Book Using Code Examples Getting the Code Examples Safari® Books Online How to Contact Us Acknowledgements1. Zero to Sixty: Introducing Scala Why Scala? If You Are a Java Programmer… If You Are a Ruby, Python, etc. Programmer… Introducing Scala The Seductions of Scala Installing Scala For More Information A Taste of Scala A Taste of Concurrency Recap and What’s Next2. Type Less, Do More In This Chapter Semicolons Variable Declarations Method Declarations Method Default and Named Arguments (Scala Version 2.8) Nesting Method Definitions Inferring Type Information Literals Integer Literals Floating Point Literals Boolean Literals Character Literals String Literals Symbol Literals Tuples Option, Some, and None: Avoiding nulls Organizing Code in Files and Namespaces Importing Types and Their Members Imports are Relative Abstract Types And Parameterized Types Reserved Words Recap and What’s Next3. Rounding Out the Essentials Operator? Operator? Syntactic Sugar Methods Without Parentheses and Dots Precedence Rules Domain-Specific Languages Scala if Statements Scala for Comprehensions A Dog-Simple Example Filtering Yielding Expanded Scope Other Looping Constructs Scala while Loops Scala do-while Loops Generator Expressions Conditional Operators Pattern Matching A Simple Match Variables in Matches Matching on Type Matching on Sequences Matching on Tuples (and Guards) Matching on Case Classes Matching on Regular Expressions Binding Nested Variables in Case Clauses Using try, catch, and finally Clauses Concluding Remarks on Pattern Matching Enumerations Recap and What’s Next4. Traits Introducing Traits Traits as Mixins Stackable Traits Constructing Traits Class or Trait? Recap and What’s Next5. Basic Object-Oriented Programming in Scala Class and Object Basics Parent Classes Constructors in Scala Calling Parent Class Constructors Nested Classes Visibility Rules Public Visibility Protected Visibility Private Visibility Scoped Private and Protected Visibility Final Thoughts on Visibility Recap and What’s Next6. Advanced Object-Oriented Programming In Scala Overriding Members of Classes and Traits Attempting to Override final Declarations Overriding Abstract and Concrete Methods Overriding Abstract and Concrete Fields Overriding Abstract and Concrete Fields in Traits Overriding Abstract and Concrete Fields in Classes Overriding Abstract Types When Accessor Methods and Fields Are Indistinguishable: The Uniform Access Principle Companion Objects Apply Unapply Apply and UnapplySeq for Collections Companion Objects and Java Static Methods Case Classes Syntactic Sugar for Binary Operations The copy Method in Scala Version 2.8 Case Class Inheritance Equality of Objects The equals Method The == and != Methods The ne and eq Methods Array Equality and the sameElements Method Recap and What’s Next7. The Scala Object System The Predef Object Classes and Objects: Where Are the Statics? Package Objects Sealed Class Hierarchies The Scala Type Hierarchy Linearization of an Object’s Hierarchy Recap and What’s Next8. Functional Programming in Scala What Is Functional Programming? Functions in Mathematics Variables that Aren’t Functional Programming in Scala Function Literals and Closures Purity Inside vs. Outside Recursion Tail Calls and Tail-Call Optimization Trampoline for Tail Calls Functional Data Structures Lists in Functional Programming Maps in Functional Programming Sets in Functional Programming Other Data Structures in Functional Programming Traversing, Mapping, Filtering, Folding, and Reducing Traversal Mapping Filtering Folding and Reducing Functional Options Pattern Matching Partial Functions Currying Implicits Implicit Conversions Implicit Function Parameters Final Thoughts on Implicits Call by Name, Call by Value Lazy Vals Recap: Functional Component Abstractions9. Robust, Scalable Concurrency with Actors The Problems of Shared, Synchronized State Actors Actors in Abstract Actors in Scala Sending Messages to Actors The Mailbox Actors in Depth Effective Actors Traditional Concurrency in Scala: Threading and Events One-Off Threads Using java.util.concurrent Events Recap and What’s Next10. Herding XML in Scala Reading XML Exploring XML Looping & Matching XML Writing XML A Real-World Example Recap and What’s Next11. Domain-Specific Languages in Scala Internal DSLs A Payroll Internal DSL Infix Operator Notation Implicit Conversions and User Defined Types Apply Methods Payroll Rules DSL Implementation Internal DSLs: Final Thoughts External DSLs with Parser Combinators About Parser Combinators A Payroll External DSL A Scala Implementation of the External DSL Grammar Generating Paychecks with the External DSL Internal vs. External DSLs: Final Thoughts Recap and What’s Next12. The Scala Type System Reflecting on Types Understanding Parameterized Types Manifests Parameterized Methods Variance Under Inheritance Variance of Mutable Types Variance In Scala vs. Java Implementation Notes Type Bounds Upper Type Bounds Lower Type Bounds A Closer Look at Lists Views and View Bounds Nothing and Null Understanding Abstract Types Parameterized Types vs. Abstract Types Path-Dependent Types C.this C.super path.x Value Types Type Designators Tuples Parameterized Types Annotated Types Compound Types Infix Types Function Types Type Projections Singleton Types Self Type Annotations Structural Types Existential Types Infinite Data Structures and Laziness Recap and What’s Next13. Application Design Annotations Enumerations vs. Pattern Matching Thoughts On Annotations and Enumerations Enumerations vs. Case Classes and Pattern Matching Using Nulls vs. Options Options and For Comprehensions Exceptions and the Alternatives Scalable Abstractions Fine-Grained Visibility Rules Mixin Composition Self-Type Annotations and Abstract Type Members Effective Design of Traits Design Patterns The Visitor Pattern: A Better Alternative Dependency Injection in Scala: The Cake Pattern Better Design with Design By Contract Recap and What’s Next14. Scala Tools, Libraries and IDE Support Command Line Tools scalac Command Line Tool The scala Command Line Tool The scalap, javap, and jad Command Line Tools The scaladoc Command Line Tool The sbaz Command Line Tool The fsc Command Line Tool Build Tools Integration with IDEs Eclipse IntelliJ NetBeans Text Editors Test-Driven Development in Scala ScalaTest Specs ScalaCheck Other Notable Scala Libraries and Tools Lift Scalaz Scalax MetaScala JavaRebel Miscellaneous Smaller Libraries Java Interoperability Java and Scala Generics Using Scala Functions in Java JavaBean Properties AnyVal Types and Java Primitives Scala Names in Java Code Java Library Interoperability AspectJ The Spring Framework Terracotta Hadoop Recap and What’s NextGlossaryA. ReferencesIndexOnline:http://programming-scala.labs.oreilly.com/index.html Quote
