raulferrerdev

let numbers: [[Int]] = [[1, 3, 6, 2], [2, 5, 7], [1, 3]]

let sum: Int = numbers
    .flatMap({ $0 })
    .reduce(0, {$0 + $1})

// sum = 30

raulferrerdev

var phrase = "The rain in Spain stays mainly in the plain."

let vowels: Set<Character> = ["a", "e", "i", "o", "u"]

phrase.removeAll(where: { vowels.contains($0) })

// phrase == "Th rn n Spn stys mnly n th pln."

raulferrerdev

var numbers: [Int] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

numbers.removeAll(where: { $0 % 2 == 0 })

// numbers = [2, 4, 6, 8, 10]

raulferrerdev

mutating func removeAll(where shouldBeRemoved: (Element) throws -> Bool) rethrows

raulferrerdev

let words: [String] = ["room", "home", "train", "green", "heroe"]

words.forEach({ word in
    guard word.count > 4 else {
        print(word.uppercased())
        return
    }

    print(word)
})

raulferrerdev

let words: [String] = ["room", "home", "train", "green", "heroe"]

let sortedWords = words.sorted(by: > )

//sortedWords = ["train", "room", "home", "heroe", "green"]

raulferrerdev

func sorted(by areInIncreasingOrder: (Element, Element) throws -> Bool) rethrows -> [Element]

raulferrerdev

let words: [String] = ["room", "home", "train", "green", "heroe"]

let sortedWords = words.sorted()

// sortedWords = ["green", "heroe", "home", "room", "train"]

raulferrerdev

func sorted() -> [Element]

raulferrerdev

var words: [String] = ["room", "home", "train", "green", "heroe"]

var swapWord: Bool = false

repeat {
    swapWord = false
    
    for n in 0...words.count - 2 {
        if words[n] > words[n + 1] {
            words.swapAt(n, n + 1)