Exercise - Collection FunctionsUsing the code below, use the map function to create an array of Int values, whose values are equal to the original integer value, plus 1. Use$0 as you iterate through the values of the array. Print the resulting collection.5 let testScores = [65, 80, 88, 90, 47]Using the code below, use the filter function to create a new array of String values. The new array should only include Strings longer thanfour characters. Use $0 as you iterate through the values of the array. Print the resulting collection.Olet schoolSubjects = ["Math" , "Computer Science", "Gym", "English", "Biology"]Using the code below, use the reduce function to subtract all of the values within the array from the starting value 100. Print the resultingvalue.let damageTaken = [25, 10, 15, 30, 20]

Part 1: testScores.map({$0 + 1})Algorithm:Initialize an array testScores with values [65, 80, 88,…

Answered: Exercise - Collection Functions Using…

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

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Part 1: `testScores.map({$0 + 1})`

Algorithm:
- Initialize an array testScores with values [65, 80, 88, 90, 47].
- Apply a mapping operation to each element in testScores, adding 1 to each element.
- Store the result in a new array called testScoresPlusOne.
- Print the testScoresPlusOne array.

Part 2: `schoolSubjects.filter({$0.count > 4})`

Algorithm:
- Initialize an array schoolSubjects with values ["Math", "Computer Science", "Gym", "English", "Biology"].
- Apply a filtering operation to schoolSubjects, keeping only elements with a character count greater than 4.
- Store the filtered elements in a new array called longSubjects.
- Print the longSubjects array.

Part 3: `damageTaken.reduce(100, {$0 - $1})`

Algorithm:
- Initialize an array damageTaken with values [25, 10, 15, 30, 20].
- Perform a reduction operation on damageTaken, starting with an initial value of 100.
- Subtract each element in damageTaken from the accumulated result.
- Store the final result in a variable called remainingHealth.
- Print the remainingHealth variable.

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