Matt Barackman mattbarackman

## Type_Families_Sealed_Traits_and_Exhaustive_Pattern_Matching_in_Scala.md

      
        
          
            
              
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                A brief lesson on Type Families, Sealed Traits, and Exhaustive Pattern Matching in Scala
              
          
        
      
        
  
      
    Scala: Type Families, Sealed Traits, and Exhaustive Pattern Matching

By: Matt Barackman
What is a Type Family?

A collection of objects or case classes that share a sealed trait.
In the example below, the type family would be a collection of traffic light colors with Red, Yellow, and Green as member objects.