2f:T4e8,function play_bingo_2(draws, boards) { // hack to break pass by reference: https://observablehq.com/@amazingdesign/passing-values-by-value-and-reference let copy = JSON.parse(JSON.stringify(boards)) let boards_left = copy.length for (let d = 0; d < draws.length; ++d) { for (let b = copy.length-1; b >= 0; b--) { for (let i = 0; i < copy[b].length; ++i) { for (let j = 0; j < copy[b][i].length; ++j) { if (copy[b][i][j] === draws[d]) { copy[b][i][j] = true } if (has_a_bingo(copy[b])) { if (boards_left > 1) { // create a new 5x5 board filled with 'bingo!' copy[b] = Array(5).fill().map(() => Array(5).fill('bingo!')) console.log(copy[b]) boards_left -= 1 } else { return parseInt(draws[d]) * sum_up_board(copy[b]) } /* if (copy.length === 1) { return parseInt(draws[d]) * sum_up_board(copy[b]) } else { copy.splice(b, 1) } */ } // end has_a_bingo condition } // end j loop } // end i loop } // end b loop } // end d loop }30:[{"id":"51ebd529952d8665faf50e260f30e8ecedf26ee53309902c64e64fc2db95a25f6a715a1d0668887df8e6e20f7c6cc9a8505ca140374ffe703e55d32d831a9c68","href":"https://static.observableusercontent.com/files/51ebd529952d8665faf50e260f30e8ecedf26ee53309902c64e64fc2db95a25f6a715a1d0668887df8e6e20f7c6cc9a8505ca140374ffe703e55d32d831a9c68","name":"bingo.txt","type":"text/plain","lastModified":1638646388288.172,"size":8489},{"id":"e5e89f7c9f3d2cff882f04fb072a63b8eb8c330e94e491b0c8e633d0d9091d564ae1b4e858004b8a9964ce663c0d7bb56aab6379e7dab4b384b5c6cb09d56c26","href":"https://static.observableusercontent.com/files/e5e89f7c9f3d2cff882f04fb072a63b8eb8c330e94e491b0c8e633d0d9091d564ae1b4e858004b8a9964ce663c0d7bb56aab6379e7dab4b384b5c6cb09d56c26","name":"test_bingo.txt","type":"text/plain","lastModified":1638646382394.476,"size":316}] 2d:{"title":"--- Day 4: Giant Squid ---","cells":[{"id":0,"value":"# --- Day 4: Giant Squid ---\n\nhttps://adventofcode.com/2021/day/4","pinned":false,"hidden":false,"mode":"md"},{"id":9,"value":"---\n## Part 1","pinned":false,"hidden":false,"mode":"md"},{"id":227,"value":"function has_a_bingo(board) {\n \n // Test rows for bingo\n for (let i = 0; i < board.length; ++i) {\n if (board[i].reduce(function(a, b){ return (a === b === true); })) {\n return true\n }\n }\n \n // Test cols \n // First create tranpose of board:\n let transpose = [[], [], [], [], []];\n\n for (let i = 0; i < board.length; ++i) {\n for (let j = 0; j < board[0].length; ++j) {\n transpose[j][i] = board[i][j];\n }\n }\n\n // Then can test cols (transposed as rows) for bingos\n for (let i = 0; i < transpose.length; ++i) {\n if (transpose[i].reduce(function(a, b){ return (a === b === true); })) {\n return true\n }\n }\n\n // No bingos found, so return false\n return false\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":302,"value":"function sum_up_board(board) {\n return board.flat().filter(a => a !== true).reduce((a, b) => {return parseInt(a) + parseInt(b)}) \n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":327,"value":"function play_bingo(draws, boards) {\n\n // hack to break pass by reference: https://observablehq.com/@amazingdesign/passing-values-by-value-and-reference\n let copy = JSON.parse(JSON.stringify(boards)) \n \n for (let d = 0; d < draws.length; ++d) {\n for (let b = 0; b < copy.length; ++b) {\n for (let i = 0; i < copy[b].length; ++i) {\n for (let j = 0; j < copy[b][i].length; ++j) {\n if (copy[b][i][j] === draws[d]) {\n copy[b][i][j] = true\n }\n } // end j loop \n } // end i loop\n \n if (has_a_bingo(copy[b])) {\n return parseInt(draws[d]) * parseInt(sum_up_board(copy[b]))\n }\n\n } // end b loop \n } // end d loop\n\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":21,"value":"### Run on test data","pinned":false,"hidden":false,"mode":"md"},{"id":373,"value":"play_bingo(test_draws, test_boards) // Should return 4512","pinned":true,"hidden":false,"mode":"ojs"},{"id":24,"value":"### Run on input data","pinned":false,"hidden":false,"mode":"md"},{"id":406,"value":"play_bingo(draws, boards)","pinned":true,"hidden":false,"mode":"ojs"},{"id":28,"value":"---\n## Part 2","pinned":false,"hidden":false,"mode":"md"},{"id":424,"value":"$2f","pinned":true,"hidden":false,"mode":"ojs"},{"id":32,"value":"### Run on test data","pinned":false,"hidden":false,"mode":"md"},{"id":429,"value":"play_bingo_2(test_draws, test_boards) // Should return 1924","pinned":true,"hidden":false,"mode":"ojs"},{"id":36,"value":"### Run on input data","pinned":false,"hidden":false,"mode":"md"},{"id":433,"value":"play_bingo_2(draws, boards) ","pinned":true,"hidden":false,"mode":"ojs"},{"id":41,"value":"---\n## Get data!\n---","pinned":false,"hidden":false,"mode":"md"},{"id":195,"value":"### Test data","pinned":false,"hidden":false,"mode":"md"},{"id":54,"value":"test_file = FileAttachment(\"test_bingo.txt\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":63,"value":"test_data = test_file.text()","pinned":true,"hidden":false,"mode":"ojs"},{"id":71,"value":"test_file_array = test_data.split('\\r\\n')","pinned":true,"hidden":false,"mode":"ojs"},{"id":76,"value":"test_draws = test_file_array[0].split(',')","pinned":true,"hidden":false,"mode":"ojs"},{"id":80,"value":"function parseData(file_data) {\n \n let boards = [];\n let board = [];\n \n for (let i = 2; i < file_data.length; ++i) {\n if (file_data[i] != \"\") {\n board.push(file_data[i].trim().split(/[ ]+/));\n if (i == file_data.length - 1) {\n boards.push(board);\n }\n } else if (file_data[i] == \"\") {\n boards.push(board);\n board = [];\n }\n\n }\n return boards\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":126,"value":"test_boards = parseData(test_file_array)","pinned":true,"hidden":false,"mode":"ojs"},{"id":202,"value":"### Input data","pinned":false,"hidden":false,"mode":"md"},{"id":204,"value":"input_file = FileAttachment(\"bingo.txt\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":214,"value":"input_data = input_file.text()","pinned":true,"hidden":false,"mode":"ojs"},{"id":218,"value":"input_file_array = input_data.split('\\r\\n')","pinned":true,"hidden":false,"mode":"ojs"},{"id":221,"value":"draws = input_file_array[0].split(',')","pinned":true,"hidden":false,"mode":"ojs"},{"id":223,"value":"boards = parseData(input_file_array)","pinned":true,"hidden":false,"mode":"ojs"}],"files":"$W30","stdlib":"1","titling":"auto"}