Swift - Determine if Array1 contains at least one object from Array2

Question

I have 2 Arrays. Say, array1 = [1,2,3,4,5] and array2 = [2,3]. How could I check in swift if array1 contains at least one item from

Answer 1

Swift 5

Just make an extension

public extension Sequence where Element: Equatable {
    func contains(anyOf sequence: [Element]) -> Bool {
        return self.filter { sequence.contains($0) }.count > 0
    }
}

Use:

let someArray = ["one", "two", "three"]
let string = "onE, Cat, dog"

let intersects = string
                   .lowercased()
                   .replacingOccurrences(of: " ", with: "")
                   .components(separatedBy: ",")
                   .contains(anyOf: someArray)
print(intersects) // true