Scala 3 Training Course

Who should attend

Existing programmers who are looking to develop commercial solutions using Scala.

Prerequisites

The Scala Programming course assumes a basic familiarity with the Java world, such as what the Java Virtual Machine (JVM) is for, how code is compiled and run, and the basics of Java development. We can deliver a 1-day primer covering these topics to give those unfamiliar with the Java ecosystem the knowledge they need in order to start using Scala - please get in touch if this is of interest.

Live, instructor-led online and on-site training

This Scala course is available for private / custom delivery for your team - face-to-face, on-site at your location of choice, or remotely via MS Teams, Zoom or your own platform - get in touch to find out how we can deliver tailored training which focuses on your project requirements and learning goals.

Introduction

• Welcome and Introductions
• Scala Background, History
• Scala Environment
• Scala IDEs / tooling
• Scala Hello World Program

Scala Classes

• Defining classes
• Constructors and Auxiliary Constructors
• Defining Methods
• Invoking methods, parameters and named parameters
• Immutable and Mutable classes

Further Scala Classes

• Class level code
• Singleton Objects
• Companion Classes
• Use of Option and None
• Pattern matching

Case Classes and Value Classes

• How to define Case classes
• Pattern matching with Case classes
• Extractors and Deep Matching
• When to use Case classes
• AnyVal class
• How to define Value classes
• Limitations of Value Classes
• When to use Value Classes  

Inheritance

• Inheritance in OO
• Scala Types and Type System
• Abstract Classes
• Overriding methods and fields
• Super key word (extending versus overriding)
• Final Keyword
• Protected
• Polymorphism
• Sealed Classes

Traits in Scala

• Introduction to Scala traits
• Traits and Classes / Objects
• Using Traits
• Trait Inheritance
• Trait Abstract Methods

Further Traits

• Marker traits
• Trait Dependencies
• Universal Traits
• Sealed traits
• Enumeration trait
• To Trait or not to Trait

Packages

• What is a Package?
• Nested Packages
• Multiple Packages per File
• Root package references
• Chained Packages
• Importing
• Access Modifiers
• Qualified Access Modifiers
• Package Objects

Collection Classes in Scala

• Arrays
• Tuples
• Lists, Sets
• Maps
• Type Parameterization

Functions In Scala

• Why Functional Programming
• Defining Functions
• Anonymous Functions
• Function Composition (compose and andThen)
• Closures
• Functions and Methods
• Recursion in Scala

Higher Order Functions

• Higher Order Function introduction
• Functions as Parameters
• Functions as return results
• Using Types to simplify function definitions
• Partially Applied Functions
• Currying Functions
• Pas by Value v Pass By Name
• Collections and Functional Programming
• The map and filter functions, the flatMap function and foldLeft / foldRight

Other Language Features

• Lazy Vals
• Implicit Conversions
• Implicit Parameters
• Implicit Objects
• Implicit Classes
• Scala Annotations

Exception Handling

• Traditional Exception Handling
• Try-Catch blocks
• Limitations with this approach
• Functional Exception Handling
• Recovering from Exceptions functionally
• Use of Option and Either
• Defining custom exception types

Testing in Scala

• Testing Frameworks in Scala
• ScalaTest
• Functional Test Suites
• Spec Based testing

Akka Actors

• What is the need for Actors?
• The Actor Model
• Actor Concepts
• Actor Communications
• Akka Actors
• Akka Actor Application Structure and Naming
• Actor DSL (Domain Specific Language)
• Actor traits
• Actor Incarnation
• Dispatching Actors

Optional Module for in-house Scala training courses - instead of Actors