Introduction to Scala Part2 : Collections

Bubu

5,815 views

Open Source Your Knowledge, Become a Contributor

Technology knowledge has to be shared and made accessible for free. Join the movement.

Create Content

Traversable: Folds

Operations: foldLeft, foldRight, /:, :, reduceLeft, reduceRight
Goal: apply a binary operation to successive elements.

Fold

return sum of a List

return the min value of a List

Open Source Your Knowledge: become a Contributor and help others learn. Create New Content

package fp101.tp02.collections
object ExerciceFold {
  /**
   * 
   * Using List.foldLeft
   * 
   * return the sum of an Integer List
   */
  def sumFoldLeft(l: List[Int]) = ???
  
  
  /**
   * 
   * Using reduceRight
   * 
   * 
   * return the min value of the List
   * 
   * scala doc:
   * 
   * def reduceRight[B >: A](op: (A, B) ⇒ B): B
   * Applies a binary operator to all elements of this sequence, going right to left.
   */
  def minReduceRight(l: List[Int]) = ???
  
}

Open Source Your Knowledge, Become a Contributor

9/10 Traversable: Folds

Traversable: Folds

FP Module 2 - 101 Scala

Introduction to Scala Part3: Option & Pattern Matching

Python from Zero to Hero

Exercice Javascript