Scala – Generic Types

  • date 18th February, 2021 |
  • by Prwatech |
  • 0 Comments

Generic Classes | Tour of Scala

Generic classes in Scala provide a powerful mechanism for writing reusable and type-safe code by allowing classes to work with different types without sacrificing type safety. A generic class is parameterize with one or more type parameters, which represent placeholder types that can be specified when creating instances of the class.

By using generic classes, developers can write flexible and versatile code that can operate on a wide range of data types while enforcing type constraints at compile time.

In Scala, generic classes provide a powerful mechanism for writing reusable and type-safe code by allowing classes to work with different types without sacrificing type safety. 

For example, a generic class Box[T] can be define to hold values of any type T. The type parameter T can be specified when creating instances of Box, such as Box[Int] or Box[String], allowing the same class implementation to work with different types of data.

 

This enables the creation of container-like data structures (e.g., lists, stacks, queues) that are independent of the specific types of elements they hold.

In Scala, generic classes are declared using square brackets ([]) to specify type parameters after the class name.

For a Specific Type
 

 

Now the compiler guarantees that the course item in someOffer can only be an Prwatech instance.

Without Type-Safety

 

 

Type safety with Generic Classes

When declaring a class in Scala, we can specify type parameters. We use square brackets to surround these type parameters.

Generic Classes | Tour of Scala

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