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

Hope this helps.

//
//  Array+CommonElements.swift
//

import Foundation

public extension Array where Element: Hashable {

    func set() -> Set {
        return Set(self)
    }

    func isSubset(of array: Array) -> Bool {
        self.set().isSubset(of: array.set())
    }

    func isSuperset(of array: Array) -> Bool {
        self.set().isSuperset(of: array.set())
    }

    func commonElements(between array: Array) -> Array {
        let intersection = self.set().intersection(array.set())
        return intersection.map({ $0 })
    }

    func hasCommonElements(with array: Array) -> Bool {
        return self.commonElements(between: array).count >= 1 ? true : false
    }
}