questions5.md

Topics covered

• Data structure creation
• Using zip

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Question 1

Create as many different forms of the following as possible:

• Array of Ints
• Dictionary of Ints and Booleans
• Set of Strings

Solution:

var ints: [Int] = []
var ints2 = [Int]()
var ints3: [Int] = [0,1,2]
var ints4 = [0,1,2]

var dict: [Int:Bool] = [:]
var dict2 = [Int:Bool]()
var dict3: [Int:Bool] = [2:true, 4: false]

var set: Set<String> = []
var set1 = Set<String>()
var set2: Set<String> = ["Kyle","is","cool"]

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Question 2

Use zip to:

• create a dictionary where the key is a String and the value is an Int
• the key represents a word in the first array and the value represents a count in the second array

Example:

let strArr = ["Kyle", "is", "like", "cool", "I", "word"]
let intArr = [3,6,5,10,4,2]
zipper(arr1: strArr, arr2: intArr) -> ["Kyle": 3, "is": 6, "like": 5, "cool": 10, "I": 4, "word": 2]

Solution:

func zipper(arr1: [String], arr2: [Int]) -> [String:Int] {
    var swiftDict = [String:Int]()
    for (str, int) in zip(arr1, arr2) {
        swiftDict[str] = int
    }
    return swiftDict
}

print(zipper(arr1: strArr, arr2: intArr))

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