Programming with Scala

Scala introduction

Scala instructions, operators and types

• Conditional statements
• Loops
• Functions
• Variables
• Operators
• Unit type
• Function type
• Null, Nothing, Any, AnyRef and AnyVal types
• Packages and imports
• Implicit imports
• Exceptions

Arrays, maps, tuples

• Creation, adding and removing array elements
• Access to Array Elements
• Arrays of fixed and variable length
• Multidimensional Arrays
• Operations with arrays
• Sorting an array
• Creating and accessing the associative tables
• Iteration, changing and sorting of associative tables
• Tuples
• Zipping

Classes and Inheritance

• Classes
• Properties with getters and setters
• Use parentheses method calls
• Properties with only getters
• Auxiliary constructors
• The primary constructor
• Nested classes
• Extending the class
• Overriding methods
• Type check and cast
• Call the superclass constructor
• Overriding fields
• Anonymous subclasses
• Abstract fields
• Constructor order and early definitions
• Scala Inheritance Hierarchy
• Objects equality

Objects

• Singletons
• Companion Objects
• Objects extending a class or trait
• Enumerations
• Packages objects
• Apply and unapply methods
• Lazy objects

Traits

• Traits as interfaces
• Traits with a specific implementation
• Redefine the abstract methods in the Traits
• Concrete and abstract fields in Traits
• Objects that use multiple Traits
• Trait construction order
• Initializing Trait fields
• Traits extending classes
• Self-types

Functions

• Functions as values
• Default arguments and named arguments
• Functions without a return value
• Anonymous functions
• Functions with Function as parameter
• Closures
• Functional Interfaces
• Currying
• Passing function as a parameter in the block of code
• Using return

Collections

• Traits collections in Scala: Map, Set and Seq
• Mutable and immutable collections
• Sequences
• Lists
• Mutable lists
• Sets
• Operators for working with collections
• Standard methods for working with collections
• Use map, reduce, fold and scan functions
• Zipping
• Iterators
• Data Streams
• Threadsafe Collections
• Parallel collections
• Interaction with Java collections

Pattern matching

• Pattern matching as a better switch
• Guards
• The variables in patterns
• Type patterns
• Matching arrays, lists and tuples
• Regular expressions
• Extractors
• Patterns in variable declarations
• Patterns in for expressions

Case classes, Option type and partial functions

• Сase classes
• Copy method and named parameters
• Sealed classes
• Option type
• Partial functions

Generics

• Generic сlasses
• Generic functions
• Type variance
• Upper and lower type bounds
• Use _ for type

Implicit conversions

• Using implicit keyword to define implicit type
• Import and use of implicit conversions
• Implicit parameters