With an Array as Any object:
var a : [Any] = []
let x : String = "This is X"
let y : Int = 9
let z : [Any] = ["1", "no. 2"]
a.append(x)
a.append(y)
a.append(z)
let ele1 = 9
let ele2 = "This is test string"
Very simple if the a is String/Int array, but this is Any array! How to check ele1, ele2 exists or not in a?
Since Any does not conform to Equatable, [Any] does not have a contains(_:) method. You cannot use == to compare Anys either.
However, [Any] does have a contains(where:) method that accepts a predicate. You can pass in a (Any) -> Bool and if there is anything in the array that makes the closure return true, contains returns true.
We can use contains(where:) to do exactly what you want. For example, if you want to check for ele2:
a.contains(where: { ($0 as? String) == ele2 })
What I did is that I casted the element to string first, then use ==.
You can also create an extension that does this:
extension Array where Element == Any {
func contains<T: Equatable>(_ element: T) -> Bool {
return contains(where: { ($0 as? T) == element })
}
}
I think you could try something like this:
a.forEach({
if let testInt: Int = $0 as? Int, ele1 == testInt {
print("found")
}
})
And similar for any other types. I'm away from my computer so haven't tested the above, but I think it should work.
