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 have a 1-day primer covering these topics to give those unfamiliar with Java the knowledge they need in order to start using Scala.

Live, instructor-led online and on-site training

We appreciate that you need flexibility to fit in with new working situations - whether you're an individual, part of a distributed team, or simply have projects and deadlines to meet. 

Our remote training can take place online in a virtual classroom, with content split into modules to accommodate your scheduling challenges and meet your learning goals. Get in touch today to find out how we can help design a cost-effective, flexible training solution.

As soon as it's safe, we'll return to also offering the on-site custom training courses and programmes upon which we've built our reputation.

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