Scala | Product3

Product3 is a trait in Scala, which is a Cartesian product of three elements. The Linear Supertypes here are Product, Equals, and Any and the known subclass here is Tuple3. It extends the trait Product i.e,

trait Product3[+T1, +T2, +T3] extends Product

Where, T1, T2, and T3 are the used parameter types of the Scala.

1. Abstract Value Members The abstract value members here are:

   • abstract def _1: T1

     It returns the elements of the first parameter type.

   • abstract def _2: T2

     It returns the elements of the second parameter type.

   • abstract def _3: T3

     It returns the elements of the third parameter type.

   • abstract def canEqual(that: Any): Boolean

     It returns true if two instances are equal else returns false.
   Example :
   Output:

   GeeksforGeeks
   32
   43.0
   

   Here, we have utilized abstract value members for accessing the elements.
2. Concrete Value Members The concrete value members here are:

   • def productArity: Int

     It returns the number of parameters in Product3 trait.

   • def productElement(n: Int): Any

     It returns nth element.

   • def productIterator: Iterator[Any]

     It returns an iterator by default.

   • def productPrefix: String

     It returns the empty string by default.
   Example :
   Output:

   3
   a
   Tuple3
   

   Here, productPrefix will return Tuple3 as Tuple3 is a final case class that extents Product3.