Scala for the Impatient, 3rd Edition

Chapter 14. Pattern Matching

Topics in This Chapter A2

• 14.1 A Better Switch

• 14.2 Guards

• 14.3 Variables in Patterns

• 14.4 Type Patterns

• 14.5 The Matchable Trait

• 14.6 Matching Arrays, Lists, and Tuples

• 14.7 Extractors

• 14.8 Patterns in Variable Declarations

• 14.9 Patterns in for Expressions

• 14.10 Case Classes

• 14.11 Matching Nested Structures

• 14.12 Sealed Classes

• 14.13 Parameterized Enumerations

• 14.14 Partial Functions A3

• 14.15 Infix Notation in case Clauses L2

• Exercises

Pattern matching is a powerful mechanism that has a number of applications: switch statements, type inquiry, and “destructuring” (getting at the parts of complex expressions). This chapter covers the many forms of the match expression, as well as the case syntax in partial functions ...