<p>Recently I started learning Scala first few concepts that learnt while modelling a domain in Scala are Case classes, traits and objects. In this blog I will try to summarize my learnings!</p>
<h2 id="heading-case-class">Case Class</h2>
<p>Scala being a functional + object oriented language, immutability plays very important role. Case classes are the ways to create immutable data. </p>
<pre><code class="lang-scala">case class Shoe(size: Int)
val kidShoe = Shoe(5)
</code></pre>
<h2 id="heading-traits">Traits</h2>
<p>Traits are similar to Java 8 interfaces, it can have abstract and non abstract methods. </p>
<pre><code><span class="hljs-class"><span class="hljs-keyword">trait</span> <span class="hljs-title">ShoeType</span></span>
       def type: <span class="hljs-built_in">Unit</span>
</code></pre><h2 id="heading-object">Object</h2>
<p>An object is a class that has exactly one instance. It is created lazily when it is referenced, like a lazy val.</p>
<pre><code>object WearAShoe{
   val adultShoe = Shoe(<span class="hljs-number">10</span>)
  <span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">main</span>(<span class="hljs-params">arg: Array[String]</span>):</span> Unit = println(<span class="hljs-string">"I wear a shoe"</span>)
}
</code></pre>

Recently I started learning Scala first few concepts that learnt while modelling a domain in Scala are Case classes, traits and objects. In this blog I will try to summarize my learnings!

## Case Class
Scala being a functional + object oriented language, immutability plays very important role. Case classes are the ways to create immutable data. 

```scala
case class Shoe(size: Int)
val kidShoe = Shoe(5)
``` 

## Traits
Traits are similar to Java 8 interfaces, it can have abstract and non abstract methods. 


```
trait ShoeType
       def type: Unit
``` 

## Object
An object is a class that has exactly one instance. It is created lazily when it is referenced, like a lazy val.

```
object WearAShoe{
   val adultShoe = Shoe(10)
  def main(arg: Array[String]): Unit = println("I wear a shoe")
}
``` 


Pradeep Sekar's Blog

Pradeep Sekar's Blog

Case Class, Traits and Objects

Case Class

Traits

Object