2024-03 Scala 2

scala2/project/build.properties

@@ -1 +1 @@
-sbt.version = 1.10.5
+sbt.version = 1.10.6

scala2/src/main/resources/2024/03-test-00.txt

@@ -0,0 +1 @@
+xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))

scala2/src/main/resources/2024/03-test-01.txt

@@ -0,0 +1 @@
+xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))

scala2/src/main/scala/jurisk/adventofcode/y2024/Advent03.scala

@@ -0,0 +1,48 @@
+package jurisk.adventofcode.y2024
+
+import jurisk.utils.FileInput._
+import jurisk.utils.Parsing.StringOps
+import mouse.all.booleanSyntaxMouse
+
+import scala.util.matching.Regex
+
+object Advent03 {
+  type Input = String
+
+  private val Number = """(\d+)""".r
+  private val Mul    = s"""mul\\($Number,$Number\\)""".r
+  private val Do     = """do\(\)""".r
+  private val Dont   = """don't\(\)""".r
+
+  def solve(options: Regex)(data: Input): Int = {
+    val matches     = options.findAllIn(data)
+    val (result, _) = matches.foldLeft((0, true)) {
+      case ((result, active), m) =>
+        m.trim match {
+          case Mul(a, b) =>
+            (result + active.fold(a.toInt * b.toInt, 0), active)
+          case Do()      =>
+            (result, true)
+          case Dont()    =>
+            (result, false)
+          case _         =>
+            m.fail
+        }
+    }
+
+    result
+  }
+
+  def part1: Input => Int = solve(Mul)
+  def part2: Input => Int = solve(List(Mul, Do, Dont).mkString("|").r)
+
+  def fileName(suffix: String): String =
+    s"2024/03$suffix.txt"
+
+  def main(args: Array[String]): Unit = {
+    val realData: Input = readFileText(fileName(""))
+
+    println(s"Part 1: ${part1(realData)}")
+    println(s"Part 2: ${part2(realData)}")
+  }
+}

scala2/src/test/scala/jurisk/adventofcode/y2024/Advent03Spec.scala

@@ -0,0 +1,32 @@
+package jurisk.adventofcode.y2024
+
+import Advent03._
+import jurisk.utils.FileInput.readFileText
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.should.Matchers._
+
+class Advent03Spec extends AnyFreeSpec {
+  private def testData00 = readFileText(fileName("-test-00"))
+  private def testData01 = readFileText(fileName("-test-01"))
+  private def realData   = readFileText(fileName(""))
+
+  "part 1" - {
+    "test" in {
+      part1(testData00) shouldEqual 2 * 4 + 5 * 5 + 11 * 8 + 8 * 5
+    }
+
+    "real" in {
+      part1(realData) shouldEqual 187825547
+    }
+  }
+
+  "part 2" - {
+    "test" in {
+      part2(testData01) shouldEqual 2 * 4 + 8 * 5
+    }
+
+    "real" in {
+      part2(realData) shouldEqual 85508223
+    }
+  }
+}

scala3/build.sbt

@@ -11,7 +11,7 @@ lazy val root = project
     ),
     scalaVersion := "3.5.2",
     libraryDependencies ++= Seq(
-      "org.typelevel" %% "cats-effect" % "3.5.5",
-      "org.scalameta" %% "munit" % "1.0.2" % Test,
+      "org.typelevel" %% "cats-effect" % "3.5.7",
+      "org.scalameta" %% "munit" % "1.0.3" % Test,
     ),
   )

scala3/project/build.properties

@@ -1 +1 @@
-sbt.version = 1.10.5
+sbt.version = 1.10.6