Consider rewriting
arr.filter().head as arr.filter().headOption21 }
22 }
23
24 def pickFirst1(arr: Array[Int], criteria: Int => Boolean): Int = arr.filter(criteria).head25 def pickFirst2(arr: Array[Int], criteria: Int => Boolean): Option[Int] =
26 arr.filter(criteria).headOption
27 def pickInAnOrder(arr: Array[Int], criteria: Int => Boolean): Array[Int] =
Description
filter allows you to select elements from your collection based on the condition specified. However, accessing these elements directly via head or last may result in the throwing of NoSuchElementException if no elements satisfy the specified condition. Therefore, it is recommended that you use headOption and lastOption respectively to access these elements.
Bad practice
val myElements = numbers.filter(x => x % 2 == 0 && x > 5)
val firstElement = myElements.head
val lastElement = myElements.last
Recommended
val myElements = numbers.filter(x => x % 2 == 0 && x > 5)
val firstElement = myElements.headOption
val lastElement = myElements.lastOption
}