How do I check if an object is a collection? (Swift)

Question

I\'m extensively using KVC to build unified interface for the needs of an app. For instance, one of my functions gets an object, which undergoes several checks based solely

Answer 1

NOTE: This solution does NOT work with Swift 5+.

func isCollection(object: T) -> Bool {
    switch object {
    case _ as Collection:
        return true
    default:
        return false
    }
}

Calling:

// COLLECTION TESTING //

let arrayOfInts = [1, 2, 3, 4, 5]
isCollection(object: arrayOfInts) // true

let setOfStrings:Set = ["a", "b", "c"]
isCollection(object: setOfStrings) // true

// [String : String]
let dictionaryOfStrings = ["1": "one", "2": "two", "3": "three"]
isCollection(object: dictionaryOfStrings) // true


// NON-COLLECTION TESTING //

let int = 101
isCollection(object: int) // false

let string = "string" // false

let date = Date()
isCollection(object: date) // false