Computer scienceProgramming languagesScalaControl flowFunctions

Implicit parameters

Theory

The implicit becomes explicit

Report a typo

Imagine we have the following conversions:

implicit def clientDataToMessage(in: (Long, String)): String =
  s"client-id: ${in._1}, client-name: ${in._2}"

implicit def clientIdToMessage(in: Long): String =
  s"client-id: $in, client-name: undefined"

Fix the log function so that it can be called as follows:

implicit val applicationId: Long = 42L

Logging.log((143213L, "Max"))
Logging.log(143213L)

In this case, the console must print:

id:42 -> client-id: 143213, client-name: Max
id:42 -> client-id: 143213, client-name: undefined

Sample Input 1: 

42
143213 Max

Sample Output 1: 

id:42 -> client-id: 143213, client-name: Max
id:42 -> client-id: 143213, client-name: undefined
Write a program in Scala
object Logging {
def log(implicit message: String, id: Long): Unit =
println(s"id:$id -> $message")
}

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