day 2 part 1

src/main/scala/Day02.scala

@@ -0,0 +1,47 @@
+import scala.util.Success
+import scala.util.Failure
+
+enum RPS:
+    case Rock, Paper, Scissor
+
+    def get_score() = this match
+        case Rock => 1
+        case Paper => 2
+        case Scissor => 3
+
+    def get_match_score(other: RPS) = (this, other) match
+        case (Rock, Scissor) | (Paper, Rock) | (Scissor, Paper) => 6
+        case (Rock, Rock) | (Paper, Paper) | (Scissor, Scissor) => 3
+        case _ => 0
+
+
+object Day02 extends Solution:
+    override def part_01() =
+        val file = read_input("02") match
+            case Success(f) => f
+            case Failure(ex) =>
+                return "Error opening file: " + ex.getMessage()
+
+        var score = 0
+
+        for line <- file.getLines() do
+            val (opponent_choice, self_choice) = (
+                line.charAt(0) match
+                    case 'A' => RPS.Rock
+                    case 'B' => RPS.Paper
+                    case 'C' => RPS.Scissor
+                    case _ => return "Unexpected char found (pos 0)"
+                ,
+                line.charAt(2) match
+                    case 'X' => RPS.Rock
+                    case 'Y' => RPS.Paper
+                    case 'Z' => RPS.Scissor
+                    case _ => return "Unexpected char found (pos 2)"
+            )
+
+            score += self_choice.get_score() + self_choice.get_match_score(opponent_choice)
+
+        s"part 2: $score"
+
+    override def part_02() = "part 2: :c"
+

src/main/scala/Main.scala

@@ -4,7 +4,7 @@ import scala.util.Random
 // Number guessing game
 @main def hello: Unit =
     println("Advent of code 2022 with Scala")
-    println(Day01.part_01())
+    println(Day02.part_01())
-    println(Day01.part_02())
+    println(Day02.part_02())