Curry example - ForEach

ForEachCurry.swift

enum LogLevel: String {
    case debug
    case error
}

func logMessage(level: LogLevel, message: String) {
    print("[\(level)] \(message)")
}

// Without Currying
let animals: [String] = ["Dog", "Cat", "Horse", "Fish"]

animals.forEach { (animal) in
  logMessage(.debug, animal)
}

animals.forEach { (animal) in
  logMessage(.error, animal)
}

// With Curry
let debug = curry(logMessage)(.debug)
let error = curry(logMessage)(.error)
let animals: [String] = ["Dog", "Cat", "Horse", "Fish"]

animals.forEach(debug)
animals.forEach(error)