Calculating modes in Swift

Modes.swift

# Calculating modes in Swift

func modes<T: BinaryFloatingPoint & Hashable>(sample: Array<T>) -> Array<T> {
    let mapped = sample.map { ($0, 1) }
    let counts = Dictionary(mapped, uniquingKeysWith: +)
    
    let max_count = counts.values.max() ?? 0
    
    let modes = counts.filter { $0.value == max_count }.map { $0.key }
    
    return modes
}

print(modes(sample: sample2.map( {Double($0)} )))