CountedSet

Minimal implementation of a counted Set in Swift.

Start by creating a CountedSet instance using a Hashable element type and by adding and removing objects:

let words = CountedSet<String>()
words.insert("Hello")
words.insert("World")
words.insert("Hello")
words.remove("World")

You can ask the CountedSet for the count of an element, which is also possible using subscripting:

let helloCount = words.count(for: "Hello") // 2
let worldCount = words.count(for: "World") // nil
let anotherHelloCount = words["Hello"] // 2

Access the most occurring element and its count, which will be returned as an optional tuple containing the element and its count:

if let (element, count) = words.mostFrequent() {
    // Do something with element and count
}