Day 6 optimized

day6/part2-optimized.kts

@@ -0,0 +1,60 @@
+#!/usr/bin/env kotlin
+
+import java.io.File
+
+fun MutableList<MutableList<Char>>.clone(): MutableList<MutableList<Char>> {
+    val grid = mutableListOf<MutableList<Char>>()
+    var i = 0;
+    this.forEach {
+        grid.add(MutableList(it.size) { j ->
+            this[i][j]
+        })
+        i++
+    }
+
+    return grid
+}
+
+enum class Direction {
+    UP,
+    DOWN,
+    RIGHT,
+    LEFT;
+
+    fun rotate90(): Direction {
+        return when (this) {
+            UP -> RIGHT
+            DOWN -> LEFT
+            RIGHT -> DOWN
+            LEFT -> UP
+        }
+    }
+}
+
+var originalGrid = mutableListOf<MutableList<Char>>()
+
+var originalGuy = Pair(0, 0);
+var originalDirection = Direction.UP
+
+var i = 0
+File("./input.txt").forEachLine {
+    val iter = it.chars().iterator()
+    var j = 0
+    originalGrid.add(MutableList(it.length) {
+        var next = iter.next().toChar()
+
+        if (next == '^') {
+            originalGuy = Pair(i, j)
+            next = '.'
+        }
+
+        j++
+        next
+    })
+
+    i++
+}
+
+
+
+println("\n" + sum)