First not nil Property

first-notnil-property.swift

import UIKit

class MyObjects: NSObject{
    var myOptional: String?
    var myRequired: String
    init(req: String, op: String?) {
        myOptional = op
        myRequired = req
    }
}

var myArray = [MyObjects]()

myArray.append(MyObjects(req: "1", op: nil))
myArray.append(MyObjects(req: "2", op: "2"))
myArray.append(MyObjects(req: "3", op: nil))
myArray.append(MyObjects(req: "3", op: "3"))


let x = myArray.map({return $0.myOptional}).flatMap({$0}).first
print(x)