Scala Tutorial

• Introduction to Scala
• Setting up the environment in Scala
• How to install Scala in Linux?
• How to install Scala in Windows?
• What makes Scala scalable?
• Hello World in Scala
• Scala | Uniform Access Principle
• Scala vs Java
• Python vs Scala
• Difference between Kotlin and Scala
• Scala | REPL

Basics

• Scala Keywords
• Scala Identifiers
• Data Types in Scala
• Variables in Scala
• Scala Console | println, printf and readLine
• Scala Identifiers
• Scala | Pattern Matching
• Comments In Scala
• Command Line Argument in Scala
• Enumeration in Scala
• Scope of Variables In Scala
• Scala | Ranges

Control Statements

• Scala | Decision Making
• Scala | Loops(while, do..while, for, nested loops)
• For Loop in Scala
• while and do while Loop in Scala
• Break statement in Scala
• Scala | Literals
• Scala | yield Keyword
• Scala | Type Inference

OOP Concepts

• Class and Object in Scala
• Inner class in Scala
• Inheritance in Scala
• Operators in Scala
• Operators Precedence in Scala
• Abstract Classes in Scala
• Singleton and Companion Objects
• Generic Classes in Scala
• Access Modifiers in Scala
• Scala Constructors
• Scala | Primary Constructor
• Scala | Auxiliary Constructor
• Calling A Super Class Constructor in Scala
• Extending a Class in Scala
• Scala | Case Class and Case Object
• Scala | Polymorphism
• Value classes
• Scala | Field Overriding
• Scala | Abstract Type members
• Type Casting in Scala
• Object Casting in Scala
• Object Equality in Scala
• Scala | Multithreading
• Scala | Final
• Scala this keyword
• Scala | Controlling visibility of constructor fields

Parameterized - Type

• Scala Type Hierarchy
• Scala | Lower Bound
• Scala | Upper bound
• Scala | Variances
• Scala | Null, null, Nil, Nothing, None, and Unit

Exceptions

• Scala | Exception Handling
• Throw Keyword in Scala
• Scala | Try-Catch Exceptions
• Scala | Finally Exceptions
• Scala | Either

Scala Annotation

• Scala | Annotation
• Scala | Self types Annotation

Methods

• Scala | Functions - Basics
• Currying Functions in Scala with Examples
• Anonymous Functions in Scala
• Higher Order Functions in Scala
• Scala | Named Arguments
• Scala | Functions Call-by-Name
• Scala | Closures
• Scala | Nested Functions
• Parameterless Method in Scala
• Recursion in Scala
• Tail Recursion in Scala
• Scala | Partially Applied functions
• Method Overloading in Scala
• Method Overriding in Scala
• Scala | Method Invocation
• Scala | Format and Formatted Method
• Controlling Method Scope In Scala
• Scala | Repeated Method Parameters
• Partial Functions in Scala
• Lambda Expression in Scala
• Scala Varargs
• Scala | Function Composition
• Call a method on a Super Class in Scala
• Implicit Conversions in Scala

String

• Scala String
• Scala | String Interpolation
• Scala | StringContext
• Regular Expressions in Scala
• StringBuilder in Scala
• String concatenation in Scala

Scala Packages

• Packages In Scala
• Scala | Package Objects
• Chained Package Clauses in Scala
• File Handling in Scala

Scala Trait

• Scala | Traits
• Scala | Sealed Trait
• Scala | Trait Mixins
• Trait Linearization in Scala
• Scala | Trait App
• Difference Between Traits and Abstract Classes in Scala
• Scala Trait Traversable

Collections

• Scala Lists
• Scala ListBuffer
• ListSet in Scala
• Scala | Arrays
• Multidimensional Arrays in Scala
• Scala | Create Array with Range
• Scala | ArrayBuffer
• Scala | Tuple
• Set in Scala
• BitSet in Scala
• HashSet In Scala
• Stack in Scala
• HashMap in Scala
• ListMap in Scala
• TreeSet in Scala
• Scala | Reduce, fold or scan
• Iterators in Scala
• Scala Map
• Scala | Methods to Call on a Map
• Scala | map() method

Scala Options

• Scala | Option
• Scala | Methods to Call Option
• Scala | unapplySeq() method

Miscellaneous Topics

• Getters and Setters in Scala
• Scala Extractors
• Scala For Comprehensions
• Scala | Sequence Comprehensions
• The Factory Pattern in Scala
• Scala | Lazy Evaluation
• Monads in Scala
• Lazy val and Infinite Sequences in Scala
• Scala Stream
• Recursive Streams and collection in Scala
• Placeholder Syntax in Scala
• Scala | Sieve of Eratosthenes
• Using Extractors with Pattern Matching In Scala
• Overriding Accessors and Mutators in Scala

How to install Scala in Windows?

Installing Scala on Windows involves setting up the Java Development Kit (JDK) first and then installing Scala. Here's a step-by-step guide:

1. Install Java Development Kit (JDK):

1. Download JDK: Go to the official Oracle website or AdoptOpenJDK to download the latest JDK for Windows.

2. Install JDK: Run the downloaded .exe or .msi file and follow the installation prompts.

3. Set JAVA_HOME:

   • Right-click on the Windows start button and select System.
   • Click on Advanced system settings on the right.
   • Click on Environment Variables.
   • Under System Variables, click New and add a new variable with:
     • Name: JAVA_HOME
     • Value: Path to your JDK installation (e.g., C:\Program Files\Java\jdk-14.0.2).
   • Click OK.

4. Update PATH:

   • In the System Variables section, find the Path variable and select it.
   • Click on Edit.
   • Add %JAVA_HOME%\bin to the list.
   • Click OK.

2. Install Scala:

There are multiple ways to install Scala on Windows. Here are two popular methods:

a. Using the official Scala installer for Windows:

1. Download the Scala installer for Windows.
2. Run the .msi file and follow the installation prompts.

b. Using SDKMAN! on Windows Subsystem for Linux (WSL):

If you have WSL (Windows Subsystem for Linux) set up, you can use SDKMAN! to install Scala.

1. Install SDKMAN!:

   curl -s "https://get.sdkman.io" | bash
   

   Then, either open a new terminal or run:

   source "$HOME/.sdkman/bin/sdkman-init.sh"
   

2. Install Scala:

   sdk install scala
   

3. Install sbt (Optional but recommended):

sbt is the default build tool for Scala. To install it on Windows:

1. Download the msi installer for sbt for Windows.
2. Run the .msi file and follow the installation prompts.

4. Verify Installation:

Open a new Command Prompt or terminal and enter:

scala -version

This should display the version of Scala that you installed. If you installed sbt, you can also check its version:

sbt --version

That's it! You should now have Scala (and optionally sbt) installed on your Windows system.

1. Installing Scala with a package manager on Windows:

   • Description: Some package managers for Windows, like Chocolatey, offer Scala installation.
   • Steps:
     • For Chocolatey:

       choco install scala
       

2. Checking Scala installation on Windows:

   • Description: Verify that Scala is correctly installed by checking the version.
   • Steps:
     • Open a Command Prompt or PowerShell window.
     • Run the command:

       scala -version