Checking if an array of custom objects contain a specific custom object

Question

say i have a very simple Person class

class Person {
    var name:String
    init(name:String) {
        self.name = name
    }
}

Answer 1

QUESTION: how do i check if people.list contains the instance alex, please?

class Person is a reference type, and var alex is a reference to the object storage. The identical-to operator === checks if two constants or variables refer to the same instance of a class.

Therefore, in order to check if the list contains a specific instance, use the predicate-based contains() method, and compare instances with ===:

if people.list.contains({ $0 === alex }) {
    // ...
}