gistfile1.txt

let myArray = [CGPoint(x: 0.1 + 0.2, y: 0), CGPoint(x: 0.3, y: 0), CGPoint(x: 2, y: 2), CGPoint(x: 2, y: 2)]

var counts = [String: Int]()
myArray.forEach { counts[$0.debugDescription] = (counts[$0.debugDescription] ?? 0) + 1 }
if let (value, count) = counts.max(by: {$0.value < $1.value}) {
    print("\(value) occurs \(count) times")   // "(0.3, 0.0) occurs 2 times\n"
}