Introduction to Scala Part2 : Collections

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Traversable : Addition

Operation ++
Goal: appends two traversables together, or appends all elements of an iterator to a traversable.

> List(1, 2, 3) ++ List(4, 5, 6)
res0: List[Int] = List(1, 2, 3, 4, 5, 6)

concatate two lists

concatate an empty list with a list

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package fp101.tp02.collections
object ExerciceAddition {
    
  /**
   * Create a method that takes two list l1 and l2 of same type
   * and return a list of all the elements of l1 followed by all the elements of l2
   * 
   * You have to do this without using l1 ++ l2 operation
   */
  def ++[T](l1: List[T], l2: List[T]): List[T] = ???
  
}