Count number of items in an array with a specific property value

Question

I have a Person() class:

class Person : NSObject {

    var firstName : String
    var lastName : String
    var imageFor : UIImage?
    var isManager : Bool?

          


        

Answer 1

Use filter method:

let managersCount = peopleArray.filter { (person : Person) -> Bool in
    return person.isManager!
}.count

or even simpler:

let moreCount = peopleArray.filter{ $0.isManager! }.count