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?      init (firstName : String, lastName: String, isManager : Bool) {         self.firstName = firstName         self.lastName = lastName         self.isManager = isManager     } } 

I have an array of Person()

var peopleArray = [Person]() 

I want to count the number of people in the array who have

 isManager: true 

I feel this is out there, but I can;t find it, or find the search parameters.

Thanks.

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