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Programming language: Scala
License: MIT License
Tags: Misc    

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README

Get Programming with Scala

Code, exercises, and answers for the book Get Programming with Scala.

Lessons are grouped per unit. Each lesson is a standalone sbt project and it has the following three packages: listings, quickchecks, trythis.

Have a look at the Table of Contents for links to all the book lessons.

Installation Requirements

Make sure the following tools are installed:

  • JDK 8+
  • sbt

Running the Code

Code Snippets (Scala Worksheets)

Some lessons are simple snippets (files with extension *.sc) also called Scala Worksheets. They can be interpreted interactively from the REPL by IDEs with dedicated Scala support, such as IntelliJ IDEA and ScalaIDE.

If you a using a text editor or your IDE doesn't support Scala Worksheets, start the REPL from sbt:

sbt console

and evaluate the file as follows:

> :load /path/to/file.sc

Executable sbt Programs

Some lessons are fully fleshed-out programs (files with extension *.scala): in order to run them, they need to be compiled. First, navigate to the folder of the lesson you are interested in.

Suppose you want to review the code for lesson 8:

cd unit1/lesson8

Start sbt:

sbt

Compile and run the code:

> run

If a lecture isn't an executable program, please see section on running Scala Worksheets.

Table of Contents

  • UNIT 0: HELLO SCALA!

    • [LESSON 1](unit0/lesson01): Why Scala?
    • [LESSON 2](unit0/lesson02): The Scala Environment
    • [LESSON 3](unit0/lesson03): sbt – Scala Build Tool

  • UNIT 1: THE BASICS

    • [LESSON 4](unit1/lesson04): Values and Variables
    • [LESSON 5](unit1/lesson05): Conditional Constructs and Loops
    • [LESSON 6](unit1/lesson06): Function as the most fundamental block of code
    • [LESSON 7](unit1/lesson07): Classes as a representation of our world
    • [LESSON 8](unit1/lesson08): CAPSTONE 1 - The Vending Machine

  • UNIT 2: OBJECT-ORIENTED FUNDAMENTALS

    • [LESSON 9](unit2/lesson09): Import and Create Packages
    • [LESSON 10](unit2/lesson10): Scope your code with Access Modifiers
    • [LESSON 11](unit2/lesson11): Singleton Objects
    • [LESSON 12](unit2/lesson12): Traits as interfaces
    • [LESSON 13](unit2/lesson13): CAPSTONE 2 - What time is it?

  • UNIT 3: HTTP SERVICE

    • [LESSON 14](unit3/lesson14): Pattern Matching
    • [LESSON 15](unit3/lesson15): Anonymous Functions
    • [LESSON 16](unit3/lesson16): Partial Functions
    • [LESSON 17](unit3/lesson17): HTTP API with http4s
    • [LESSON 18](unit3/lesson18): CAPSTONE 3- The Time HTTP Server

  • UNIT 4: IMMUTABLE DATA AND STRUCTURES

    • [LESSON 19](unit4/lesson19): Case classes to structure our data
    • [LESSON 20](unit4/lesson20): Higher Order Functions
    • [LESSON 21](unit4/lesson21): What is Purity?
    • [LESSON 22](unit4/lesson22): Option
    • [LESSON 23](unit4/lesson23): Working with Option: map and flatMap
    • [LESSON 24](unit4/lesson24): Working with Option: for-comprehension
    • [LESSON 25](unit4/lesson25): Tuple and Unapply
    • [LESSON 26](unit4/lesson26): CAPSTONE 4 - Rock, Paper, Scissors, Lizard, Spock!

  • UNIT 5: LIST

    • [LESSON 27](unit5/lesson27): List
    • [LESSON 28](unit5/lesson28): Working with List: map and flatMap
    • [LESSON 29](unit5/lesson29): Working with List: properties
    • [LESSON 30](unit5/lesson30): Working with List: element selection
    • [LESSON 31](unit5/lesson31): Working with List: filtering
    • [LESSON 32](unit5/lesson32): Working with List: sorting and other operations
    • [LESSON 33](unit5/lesson33): CAPSTONE 5 – The Movies Dataset

  • UNIT 6: OTHER COLLECTIONS AND ERROR HANDLING

    • [LESSON 34](unit6/lesson34): Set
    • [LESSON 35](unit6/lesson35): Working with Set
    • [LESSON 36](unit6/lesson36): Map
    • [LESSON 37](unit6/lesson37): Working with Map
    • [LESSON 38](unit6/lesson38): Either
    • [LESSON 39](unit6/lesson39): Working with Either
    • [LESSON 40](unit6/lesson40): Error Handling with Try
    • [LESSON 41](unit6/lesson41): CAPSTONE 6 – The Library Application

  • UNIT 7: CONCURRENCY

    • [LESSON 42](unit7/lesson42): Implicit and Type Classes
    • [LESSON 43](unit7/lesson43): Future
    • [LESSON 44](unit7/lesson44): Working with Future: map and flatMap
    • [LESSON 45](unit7/lesson45): Working with Future: for-comprehension and other operations
    • [LESSON 46](unit7/lesson46): Database queries with Quill
    • [LESSON 47](unit7/lesson47): CAPSTONE 7 – The Quiz Application: Part 1

  • UNIT 8: JSON (DE)SERIALIZATION

    • [LESSON 48](unit8/lesson48): JSON (De)serialization with circe
    • [LESSON 49](unit8/lesson49): Lazy Evaluation
    • [LESSON 50](unit8/lesson50): The IO type
    • [LESSON 51](unit8/lesson51): Working with the IO type
    • [LESSON 52](unit8/lesson52): Testing with ScalaTest
    • [LESSON 53](unit8/lesson53): CAPSTONE 8 – The Quiz Application: Part 2