Created
February 1, 2019 15:29
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sudoku validation
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| function rowValidity(row: number[]): boolean { | |
| const numSet = new Set(row); | |
| const deDupedRow = Array.from(numSet); | |
| const allNumsInValidRange = deDupedRow.reduce((acc, cur) => { | |
| if (cur < 1 || cur > 9 || acc === false) { | |
| return false; | |
| } else { | |
| return true; | |
| } | |
| }, true); | |
| const inputLengthIsValid = row.length === 9; | |
| const noDuplicates = deDupedRow.length === 9; | |
| return allNumsInValidRange && inputLengthIsValid && noDuplicates; | |
| } | |
| function validityTest(puzzle: number[][]): boolean { | |
| const allRowsAreValid = puzzle.reduce((acc, row) => acc ? rowValidity(row) : false, true); | |
| console.log('allRowsAreValid:', allRowsAreValid); | |
| let allColumnsValid = true; | |
| for (let i = 0; i < puzzle.length; i++) { | |
| if (allColumnsValid) { | |
| let column = puzzle.map(row => row[i]) | |
| allColumnsValid = rowValidity(column) | |
| } | |
| } | |
| console.log('allColumnsValid:', allColumnsValid); | |
| let allSquaresValid = true; | |
| for (let i = 0; i < puzzle.length; i += 3) { | |
| for (let j = 0; j < puzzle.length; j += 3) { | |
| if (allSquaresValid) { | |
| const square = [ | |
| puzzle[i][j], puzzle[i+1][j], puzzle[i+2][j], | |
| puzzle[i][j+1], puzzle[i+1][j+1], puzzle[i+2][j+1], | |
| puzzle[i][j+2], puzzle[i+1][j+2], puzzle[i+2][j+2] | |
| ] | |
| allSquaresValid = rowValidity(square) | |
| } | |
| } | |
| } | |
| console.log('allSquaresValid:', allSquaresValid); | |
| return allRowsAreValid && allColumnsValid && allSquaresValid; | |
| } | |
| const input1 = [ | |
| [5, 3, 4, 6, 7, 8, 9, 1, 2], | |
| [6, 7, 2, 1, 9, 5, 3, 4, 8], | |
| [1, 9, 8, 3, 4, 2, 5, 6, 7], | |
| [8, 5, 9, 7, 6, 1, 4, 2, 3], | |
| [4, 2, 6, 8, 5, 3, 7, 9, 1], | |
| [7, 1, 3, 9, 2, 4, 8, 5, 6], | |
| [9, 6, 1, 5, 3, 7, 2, 8, 4], | |
| [2, 8, 7, 4, 1, 9, 6, 3, 5], | |
| [3, 4, 5, 2, 8, 6, 1, 7, 9] | |
| ]; | |
| const input2 = [ | |
| [5, 3, 4, 6, 7, 8, 9, 1, 2], | |
| [6, 7, 2, 1, 9, 5, 3, 4, 1], | |
| [1, 9, 8, 3, 4, 2, 5, 6, 7], | |
| [8, 5, 9, 7, 6, 1, 4, 2, 3], | |
| [4, 2, 6, 8, 5, 3, 7, 9, 1], | |
| [7, 1, 3, 9, 2, 4, 8, 5, 6], | |
| [9, 6, 1, 5, 3, 7, 2, 8, 4], | |
| [2, 8, 7, 4, 1, 9, 6, 3, 5], | |
| [3, 4, 5, 2, 8, 6, 1, 7, 9] | |
| ]; | |
| console.log(validityTest(input1)) | |
| console.log(validityTest(input2)) | |
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