Introduction to Scala Part2 : Collections

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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

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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]) = ???
  
}

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9/10 Traversable: Folds

Traversable: Folds

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