Update SBT, fix compilation issues, solve y2019 so far

aoc/src/main/scala/aoc/Main.scala

@@ -8,6 +8,7 @@ object Main {
     "2016" -> y2016.!,
     "2017" -> y2017.!,
     "2018" -> y2018.!,
+    "2019" -> y2019.!,
   )
 
   def main(args: Array[String]): Unit = {
@@ -15,7 +16,7 @@ object Main {
     val day = askForDay(year)
     val part = askForPart(day)
     println("Problem input? End input with an `End of Input` line.")
-    val input = Stream.continually(StdIn.readLine()).takeWhile(_ != "End of Input").toList.mkString("\n")
+    val input = LazyList.continually(StdIn.readLine()).takeWhile(_ != "End of Input").toList.mkString("\n")
     println(s"Output: ${part(input)}")
   }
 

aoc/src/main/scala/aoc/y2018/Day04.scala

@@ -142,25 +142,25 @@ object Day04 extends Day {
 
   override def part1(input: String): String = {
     return ??? // Fixme: This all sucks and is broken please send an ambulance
-    val actions = getActions(input)
-    println(actions.mkString("\n"))
-    val dayGroups = actions.groupBy(_.t.d)
-    val fleshedOut: Map[Date, List[Option[Action]]] = dayGroups.mapValues(l => {
-      val zipped = l.map(_.t.t.mi).zip(l).toMap
-      List.tabulate(60 * 2)(n => zipped.get(n + (60 * 11)))
-    })
-    val endState = fleshedOut.foldLeft(State()) {
-      case (s, (_, al)) =>
-        al.foldLeft(s)(_.step(_))
-    }
-    val days = endState.d
-    println()
-    val Day(_, Some(mostSleep), _) = days.maxBy(_.mins.count(!_.state))
-    println(days.map(_.mins.size).mkString("\n"))
-    val maxMinutes = days.map(_.mins.size).max
-    val minutesToDays = days.map(_.mins.padTo(maxMinutes, Minute(true))).transpose
-    val (_, mostConsistency) = minutesToDays.zipWithIndex.maxBy { case (l, _) => l.count(!_.state) }
-    (mostSleep * mostConsistency).toString
+//    val actions = getActions(input)
+//    println(actions.mkString("\n"))
+//    val dayGroups = actions.groupBy(_.t.d)
+//    val fleshedOut: Map[Date, List[Option[Action]]] = dayGroups.mapValues(l => {
+//      val zipped = l.map(_.t.t.mi).zip(l).toMap
+//      List.tabulate(60 * 2)(n => zipped.get(n + (60 * 11)))
+//    })
+//    val endState = fleshedOut.foldLeft(State()) {
+//      case (s, (_, al)) =>
+//        al.foldLeft(s)(_.step(_))
+//    }
+//    val days = endState.d
+//    println()
+//    val Day(_, Some(mostSleep), _) = days.maxBy(_.mins.count(!_.state))
+//    println(days.map(_.mins.size).mkString("\n"))
+//    val maxMinutes = days.map(_.mins.size).max
+//    val minutesToDays = days.map(_.mins.padTo(maxMinutes, Minute(true))).transpose
+//    val (_, mostConsistency) = minutesToDays.zipWithIndex.maxBy { case (l, _) => l.count(!_.state) }
+//    (mostSleep * mostConsistency).toString
   }
 
   override def part2(input: String): String = ???

aoc/src/main/scala/aoc/y2018/Day05.scala

@@ -32,8 +32,8 @@ object Day05 extends Day {
   }
 
   override def part2(input: String): String = {
-    val allChars = input.map(_.toLower).distinct.sortBy(c => input.count(_ == c))
-    val mapped = allChars.par.map(c => simpleLength(input.filter(_.toLower != c)))
+    val allChars = input.map(_.toLower).toSeq.distinct.sortBy(c => input.count(_ == c))
+    val mapped = allChars.map(c => simpleLength(input.filter(_.toLower != c)))
     mapped.min.toString
   }
 

aoc/src/main/scala/aoc/y2019/Day01.scala

@@ -0,0 +1,22 @@
+package aoc.y2019
+
+import aoc.Day
+
+object Day01 extends Day {
+
+  def fuel(mass: Int): Int = (mass / 3) - 2
+
+  override def part1(input: String): String = {
+    val masses = input.linesIterator.map(_.toInt)
+    masses.map(fuel).sum[Int].toString
+  }
+
+  override def part2(input: String): String = {
+    val masses = input.linesIterator.map(_.toInt)
+    masses.map { initial =>
+      lazy val fuels: LazyList[Int] = fuel(initial) #:: fuels.map(fuel)
+      fuels.takeWhile(_ > 0).sum
+    }.sum[Int].toString
+  }
+
+}

aoc/src/main/scala/aoc/y2019/Day02.scala

@@ -0,0 +1,62 @@
+package aoc.y2019
+
+import aoc.Day
+import cats.data.State
+
+object Day02 extends Day {
+
+  case class Machine(memory: List[Int], pointer: Int)
+  type MachineState = State[Machine, Boolean]
+
+  val ops: Map[Int, (Int, Int) => Int] = Map(
+    1 -> (_ + _),
+    2 -> (_ * _)
+  )
+
+  def initialReplacement(noun: Int, verb: Int): MachineState = State {
+    case Machine(memory, 0) =>
+      (Machine(memory.updated(1, noun).updated(2, verb), 0), false)
+  }
+
+  val step: MachineState = State {
+    case Machine(memory, pointer) =>
+      memory(pointer) match {
+        case 99 => (Machine(memory, pointer), true)
+        case opcode =>
+          val inputAAddress = memory(pointer + 1)
+          val inputBAddress = memory(pointer + 2)
+          val valueA = memory(inputAAddress)
+          val valueB = memory(inputBAddress)
+          val outputAddress = memory(pointer + 3)
+          val op = ops(opcode)
+          (Machine(memory.updated(outputAddress, op(valueA, valueB)), pointer + 4), false)
+      }
+  }
+
+  def runMachine(memory: List[Int], noun: Int, verb: Int): Int = {
+    val initialState = Machine(memory, 0)
+    val initialReplacementState = initialReplacement(noun, verb).run(initialState).value
+    lazy val states: LazyList[(Machine, Boolean)] =
+      initialReplacementState #:: states.map {
+        case (currentState, _) => step.run(currentState).value
+      }
+    val (lastState, _) = states.takeWhile(!_._2).last
+    lastState.memory.head
+  }
+
+  override def part1(input: String): String = {
+    val memory = input.split(",").map(_.toInt).toList
+    runMachine(memory, 12, 2).toString
+  }
+
+  override def part2(input: String): String = {
+    val memory = input.split(",").map(_.toInt).toList
+    val magic = 19690720
+    val solutions = for {
+      noun <- 0 to 99
+      verb <- 0 to 99 if runMachine(memory, noun, verb) == magic
+    } yield noun * 100 + verb
+    solutions.head.toString
+  }
+
+}

aoc/src/main/scala/aoc/y2019/package.scala

@@ -0,0 +1,10 @@
+package aoc
+
+package object y2019 extends Year {
+
+  override def days: Map[String, Day] = Map(
+    "1" -> Day01,
+    "2" -> Day02,
+  )
+
+}

build.sbt

@@ -4,18 +4,21 @@ val sharedSettings = Seq(
   name         := "aoc",
   organization := "tf.bug",
   version      := "0.1.0",
-  scalaVersion := "2.12.7",
+  scalaVersion := "2.13.1",
   libraryDependencies ++= List(
-    "com.lihaoyi" %%% "fastparse"      % "2.0.4",
-    "org.scala-graph" %%% "graph-core" % "1.12.5",
+    "com.lihaoyi" %%% "fastparse"      % "2.1.3",
+    "org.scala-graph" %%% "graph-core" % "1.13.1",
+    "org.typelevel" %%% "cats-core"    % "2.0.0",
   ),
   mainClass := Some("tf.bug.aoc.Main"),
 )
 
-lazy val aoc = crossProject(JSPlatform, JVMPlatform /* , NativePlatform */ )
-  .crossType(CrossType.Pure)
-  .settings(sharedSettings)
-
-lazy val aocJS = aoc.js
-lazy val aocJVM = aoc.jvm
+// lazy val aoc = crossProject(/* JSPlatform, */ JVMPlatform /* , NativePlatform */ )
+//   .crossType(CrossType.Pure)
+//   .settings(sharedSettings)
+//
+// lazy val aocJS = aoc.js
+// lazy val aocJVM = aoc.jvm
 // lazy val aocNative = aoc.native
+
+lazy val aoc = (project in file("aoc")).settings(sharedSettings)

project/build.properties

@@ -1 +1 @@
-sbt.version = 1.2.6
+sbt.version = 1.3.1

project/plugins.sbt

@@ -1,4 +1,4 @@
-addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject"      % "0.6.0")
-addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "0.6.0")
-addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % "0.6.25")
-addSbtPlugin("org.scala-native"   % "sbt-scala-native"              % "0.3.8")
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject"      % "0.6.1")
+addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "0.6.1")
+addSbtPlugin("org.scala-js"       % "sbt-scalajs"                   % "0.6.31")
+addSbtPlugin("org.scala-native"   % "sbt-scala-native"              % "0.3.9")