jdev7

extension String {
    static func randomString(size: UInt) -> String {
        let stringSet = "0123456789aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ"
        
        return (0..<size).reduce("", { (partialResult, _) -> String in
            let randomIndex = arc4random_uniform(UInt32(stringSet.count))
            let charIndex = stringSet.index(stringSet.startIndex, offsetBy: String.IndexDistance(randomIndex))
            return partialResult.appending(String(stringSet[charIndex]))
        })
    }

jdev7

struct Person {
    let name: String
    let lastName: String
    let birthDate: Date
  
    init(name: String, lastName: String, birthDate: String) {
        let df = DateFormatter()
        df.dateFormat = "dd-MM-yyyy"
        
        self.name = name

jdev7

let booleans = [true, true, false, true, false]
let booleans2 = [true, true, true, true, true]
let result = booleans.reduce(true, { $0 && $1 })
let result2 = booleans2.reduce(true, { $0 && $1 })
print(result) // false
print(result2) // true

jdev7

let collection = [5, 3, 10, 1, 7]
let total = collection.reduce(0, +)
// 26

jdev7

let stringsCollection = ["Swi", "ft ", "ro", "cks", "!!"]
let finalString = stringsCollection.reduce("", +)
// Swift rocks!!