most frequent element in array swift
func mostFrequent(array: [Int]) -> (value: Int, count: Int)? {
var counts = [Int: Int]()
array.forEach { counts[$0] = (counts[$0] ?? 0) + 1 }
if let (value, count) = counts.max(by: {$0.1 < $1.1}) {
return (value, count)
}
// array was empty
return nil
}
if let result = mostFrequent(array: [1, 3, 2, 1, 1, 4, 5]) {
print("(result.value) occurs (result.count) times")
}