scala case class example – scala tutorial pdf

Case Classes

Defining A Case Class

Scala Tutorial: Case Classes

scala case class example

Case Class

 · Let’s start by defining an example case class: case class CovidCountryStatscountryCode: String deaths: Int confirmedCases: Int By default all constructor parameters are public and immutable We can change them to be var but it’s not what they were designed for

Scala Case Class and Pattern Matching Example, A case class which has no arguments is declared as case object instead of case class, case object is serializeable by default, trait SuperTrait, case class CaseClass1 a:Int,b:Int extends SuperTrait, case class CaseClass2 a:Int extends SuperTrait, case object CaseObject extends SuperTrait,

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With case classes: case class Fooi: Int val a = Foo3 val b = Foo3 printlna == b// “true” because their members have the same value PDF – Download Scala Language for free

Scala match/case expressions syntax examples

A Scala Case Class is like a regular class, except it is good for modeling immutable data, It also serves useful in pattern matching, such a class has a default apply method which handles object construction, A scala case class also has all val s, which means they are immutable, Let’s Revise Scala Syntax with example, 3, Defining a Minimal Case Class in Scala

In our previous Scala Tutorial we studied Scala Trait Mixins and today we will see what is Scala Pattern Matching with examples Moreover we will discuss the types of pattern matching in Scala Programming LangaugeAt last, we will discuss pattern matching with example & syntax and Scala Pattern Matching Case Class,

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 · Scala Case Class Methods In the example above we saw that the case class implements it’s own methods for checking equality and creating new instances hence why we can omit the new keyword when creating an instance of a case class The case class automatically generates several methods for you, including some that override their standard implementation and others that provide extra functionality, …

 · Case Class Feature 4 – Copy method, Case classes in Scala come with a handy copy method: val jim3 = jim, copy age = 45 println jim3 We can also specify new parameters to overwrite from the existing instance when calling copy, We did this above when specifying age to be 45,

 · The Scala compiler also appends a copy method to case class that is utilized to create a duplicate of the same object with changing some parameters or without altering them, Example : To create a duplicate of same instance without altering the parameters,

Scala class examples constructors case classes

Case Classes in Scala

Case class is also a class, which is defined with “case” modifier, Scala case classes are just regular classes which are immutable by d

Difference Between Class and Case Class in Scala

 · Basic Scala class examples # a basic class class Personvar name: String var age: Int # use the class val al = new Person”Al” 42 al,name // “Al” al,age // 42 A bit more real-world:

Scala Language Tutorial => Case Class Equality

 · scala> case class Timehours: Int = 0, mins: Int = 0 defined class Time scala> val time1 = Time12, 13 time1: Time = Time12,13 scala> val time2 = Time11, 12 time2: Time = Time11,12 scala> time1 == time2 res6: Boolean = false scala> val time3 = Time10, 11 time3: Time = Time10,11 scala> time1 == time2 res7: Boolean = false

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Scala Case Class

 · Scala match expressions Scala has a concept of a match expression In the most simple case you can use a match expression like a Java switch statement: i match { case 1 => println”January” case 2 => println”February” case 3 => println”March” case 4 => println”April” case 5 => println”May” case 6 => println”June” case 7 =>

14 Types Scala Pattern Matching – Syntax Example Case Class

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Scala Case Classes and Case Object