day 15 puzzle 1

src/day15/Puzzle1.scala

@@ -0,0 +1,42 @@
+package day15
+
+import scala.io.{BufferedSource, Source}
+
+object Puzzle1 {
+  var values: Array[String] = Array.empty
+  def loadInput(path: String): Unit = {
+    val source: BufferedSource = Source.fromFile(path)
+    val line: String = source.getLines().mkString
+
+    values = line.split(",")
+
+    source.close()
+  }
+
+  def hash(str: String): Int = {
+    var value: Int = 0
+    for (c: Char <- str) {
+      value += c
+      value *= 17
+      value %= 256
+    }
+    return value
+  }
+
+  def solve(path: String): Int = {
+    loadInput(path)
+
+    var solution: Int = 0
+
+    for (value: String <- values) {
+      solution += hash(value)
+    }
+
+    return solution
+  }
+
+  def main(args: Array[String]): Unit = {
+    val solution: Int = solve("./res/day15/input1.txt")
+    println(solution)
+  }
+}

tests/day15/Puzzle1Test.scala

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+package day15
+
+import org.scalatest.funsuite.AnyFunSuite
+
+class Puzzle1Test extends AnyFunSuite {
+  test("Puzzle1.solve") {
+    assert(Puzzle1.solve("tests_res/day15/input1.txt") == 1320)
+  }
+}

tests_res/day15/input1.txt

@@ -0,0 +1 @@
+rn=1,cm-,qp=3,cm=2,qp-,pc=4,ot=9,ab=5,pc-,pc=6,ot=7