Mode

gistfile1.swift

import Foundation

extension Sequence where Element: Hashable {
    public func mode() -> [Element] {
        var freq = [Element:Int]()
        self.forEach { freq[$0] = (freq[$0] ?? 0)+1 }
        var max = freq.values.max()
        return freq.filter { $0.1 == max }.map { $0.0 }
    }
}

print("Protocol Oriented Programming is amazing!".mode())
print([1,1,1,1,2,3,10].mode())