complete the following function. // It is the same as observeCounter except that f has a parameter of type List[Counter] not Counter. // f will insist that the List[Counter] has length 3. // You must return a List[Int] not an Int. // The first element of the result List[Int] must correspond to the number of times that increment/decrement were called on the first element of type List[Counter], similarly for the second and third elements. def observeCounterList (f : List[Counter] => Unit) : List[Int] = { // TODO: Provide definition here. List (-1, -1, -1) }
complete the following function. // It is the same as observeCounter except that f has a parameter of type List[Counter] not Counter. // f will insist that the List[Counter] has length 3. // You must return a List[Int] not an Int. // The first element of the result List[Int] must correspond to the number of times that increment/decrement were called on the first element of type List[Counter], similarly for the second and third elements. def observeCounterList (f : List[Counter] => Unit) : List[Int] = { // TODO: Provide definition here. List (-1, -1, -1) }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
complete the following function.
// It is the same as observeCounter except that f has a parameter of type List[Counter] not Counter.
// f will insist that the List[Counter] has length 3.
// You must return a List[Int] not an Int.
// The first element of the result List[Int] must correspond to the number of times that increment/decrement were called on the first element of type List[Counter], similarly for the second and third elements.
def observeCounterList (f : List[Counter] => Unit) : List[Int] = {
// TODO: Provide definition here.
List (-1, -1, -1)
}
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