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O.O#O.#...OO##.#OO..#...O..OO#.O.....##..OO.....##..#O...#...OO#.O...#......#.O#..##..#.O.....O#.#.O O..#O.O...OO.#O.O....#.OO...O...#..O.O..#OO............#........O..#.....#OOOO...O......O.##.O....O# #...#OO.OO.#.#...O...O....O..##.O...#..O.......####.....#......#..O...#.##....#O..O..O.#.#.#......O. .....O...O..#.O#...O..#.#.O#.O.OO.#..........O...OO#O#.....#.OO.........#OO.O...O..OO.O.#......O##..`30:T6a7,movePlatform = (platform, dir) => { let moved = platform.map((line, y) => line.map((el, x) => el)); switch (dir) { case "N": for (let y = 1; y < moved.length; y++) { for (let x = 0; x < moved[0].length; x++) { if (moved[y][x] == "O") { let newY = y; while (newY > 0 && moved[newY - 1][x] == ".") { newY--; } moved[y][x] = "."; moved[newY][x] = "O"; } } } break; case "S": for (let y = moved.length - 2; y >= 0; y--) { for (let x = 0; x < moved[0].length; x++) { if (moved[y][x] == "O") { let newY = y; while (newY < moved.length - 1 && moved[newY + 1][x] == ".") { newY++; } moved[y][x] = "."; moved[newY][x] = "O"; } } } break; case "W": for (let y = 0; y < moved.length; y++) { for (let x = 1; x < moved[0].length; x++) { if (moved[y][x] == "O") { let newX = x; while (newX > 0 && moved[y][newX - 1] == ".") { newX--; } moved[y][x] = "."; moved[y][newX] = "O"; } } } break; case "E": for (let y = 0; y < moved.length; y++) { for (let x = moved[0].length - 2; x >= 0; x--) { if (moved[y][x] == "O") { let newX = x; while (newX < moved[0].length - 1 && moved[y][newX + 1] == ".") { newX++; } moved[y][x] = "."; moved[y][newX] = "O"; } } } break; } return moved; }31:[] 2d:{"title":"Day 14 - Parabolic Reflector Dish","cells":[{"id":0,"value":"# Day 14 - [Parabolic Reflector Dish](https://adventofcode.com/2023/day/14)","pinned":false,"hidden":false,"mode":"md"},{"id":5,"value":"inputs0 = `O....#....\nO.OO#....#\n.....##...\nOO.#O....O\n.O.....O#.\nO.#..O.#.#\n..O..#O..O\n.......O..\n#....###..\n#OO..#....`","pinned":false,"hidden":false,"mode":"ojs"},{"id":7,"value":"$2f","pinned":false,"hidden":false,"mode":"ojs"},{"id":19,"value":"platform = inputs.split(\"\\n\").map((line) => line.split(\"\"))","pinned":true,"hidden":false,"mode":"ojs"},{"id":280,"value":"## Toolbox","pinned":true,"hidden":false,"mode":"md"},{"id":44,"value":"$30","pinned":true,"hidden":false,"mode":"ojs"},{"id":39,"value":"plotResult = (map) =>\n html`

${map\n    .map((line) => line.join(\" \"))\n    .join(\"
\")}

`","pinned":true,"hidden":false,"mode":"ojs"},{"id":36,"value":"calcHash = (platform) =>\n platform.reduce(\n (rowsum, row, y) =>\n rowsum +\n (y + 1) *\n row.reduce((colsum, col, x) => colsum + (x + 1) * col.charCodeAt(0), 0),\n 0\n )","pinned":true,"hidden":false,"mode":"ojs"},{"id":76,"value":"runCycle = (platform) => {\n return movePlatform(\n movePlatform(movePlatform(movePlatform(platform, \"N\"), \"W\"), \"S\"),\n \"E\"\n );\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":81,"value":"function* findRepeatingCycle(platform, maxCycles) {\n let hashes = [];\n let cycled = runCycle(platform);\n let hash = calcHash(cycled);\n while (hashes.length < maxCycles && !hashes.includes(hash)) {\n yield { hashes: hashes, lastHash: hash, lastMove: cycled };\n hashes.push(hash);\n cycled = runCycle(cycled);\n hash = calcHash(cycled);\n }\n yield { hashes: hashes, lastHash: hash, lastMove: cycled };\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":11,"value":"## Part 1","pinned":false,"hidden":false,"mode":"md"},{"id":55,"value":"moved = movePlatform(platform, \"N\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":126,"value":"calcLoad = (platform) =>\n platform.reduce(\n (sum, line, y) =>\n sum + line.filter((el) => el == \"O\").length * (moved.length - y),\n 0\n )","pinned":true,"hidden":false,"mode":"ojs"},{"id":129,"value":"result1 = calcLoad(moved)","pinned":true,"hidden":false,"mode":"ojs"},{"id":41,"value":"plotResult(moved)","pinned":true,"hidden":false,"mode":"ojs"},{"id":13,"value":"## Part 2","pinned":false,"hidden":false,"mode":"md"},{"id":93,"value":"repeatingCycle = findRepeatingCycle(platform, 1000000000)","pinned":true,"hidden":false,"mode":"ojs"},{"id":184,"value":"cycleStart = repeatingCycle.hashes.indexOf(repeatingCycle.lastHash)","pinned":true,"hidden":false,"mode":"ojs"},{"id":179,"value":"cycleLength = repeatingCycle.hashes.length - cycleStart","pinned":true,"hidden":false,"mode":"ojs"},{"id":121,"value":"final = findRepeatingCycle(\n platform,\n cycleStart + (((1000000000 - cycleStart) % cycleLength) - 1)\n)","pinned":true,"hidden":false,"mode":"ojs"},{"id":134,"value":"resul2 = calcLoad(final.lastMove)","pinned":true,"hidden":false,"mode":"ojs"},{"id":239,"value":"plotResult(final.lastMove)","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W31","stdlib":"1","titling":"auto"}