CODEWITHSUNDEEP
scala
Anton Kim
Anton Kim

Reputation: 943

SCALA - using other variable in case matching

Currently I have:

val bar = "good"
val foo = bar match {
            case "good" => "GREAT"
            case _ => "BAD"
          }

I would like to use another variable as a condition in case like this:

val x = 5
val bar = "good"
val foo = bar match {
        case "good" and x = 5 => "GREAT"
        case _ => "BAD"
      }

Tried but didn't work:

val x = 5
val bar = "good"
val foo = bar match {
        case y if (y == "good" && x == 5) => "GREAT"
        case _ => "BAD"
      }

Is something like this possible? Thanks.

Upvotes: 0

Views: 92

Answers (2)

Dima
Dima

Reputation: 40500

What you wrote as "tried but didn't work", should actually work. Not sure what your problem was. Next time, please paste an actual error message rather than just saying "it didn't work".

You can also match against a tuple:

val x = 5
val bar = "good"
val foo = (bar, x) match {
   case ("good", 5) => "GREAT"
   case _ => "BAD"
}

Upvotes: 5

jwvh
jwvh

Reputation: 51271

You almost had it.

val foo = bar match {
  case "good" if x == 5 => "GREAT"
  case _ => "BAD"
}

Upvotes: 3

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