How do I check in Swift if two arrays contain the same elements regardless of the order in which those elements appear in?

Question

Let\'s say there are two arrays...

var array1 = [\"a\", \"b\", \"c\"]
var array2 = [\"b\", \"c\", \"a\"]

I\'d like the result of the compar

Answer 1

Swift 3, 4

extension Array where Element: Comparable {
    func containsSameElements(as other: [Element]) -> Bool {
        return self.count == other.count && self.sorted() == other.sorted()
    }
}

// usage
let a: [Int] = [1, 2, 3, 3, 3]
let b: [Int] = [1, 3, 3, 3, 2]
let c: [Int] = [1, 2, 2, 3, 3, 3]

print(a.containsSameElements(as: b)) // true
print(a.containsSameElements(as: c)) // false

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