| 4 | 4 | // |
| 5 | 5 | |
| 6 | 6 | /** |
| 7 | | * @param {string[]} input |
| 8 | | * @returns {string[]} |
| 7 | * Annotates a flower field by replacing empty spaces with the count of adjacent flowers. |
| 8 | * @param {string[]} input - A 2D array represented as a string array, where each string is a row of the garden. |
| 9 | * @returns {string[]} - The annotated garden with counts of adjacent flowers in empty spaces. |
| 9 | 10 | */ |
| 10 | 11 | export const annotate = (input) => { |
| 11 | | throw new Error('Remove this statement and implement this function'); |
| 12 | // Edge Case: Handle empty input |
| 13 | if (!input || input.length === 0) { |
| 14 | return []; |
| 15 | } |
| 16 | |
| 17 | const rows = input.length; |
| 18 | |
| 19 | // Directions for 8 adjacent cells (horizontal, vertical, diagonal) |
| 20 | const directions = [ |
| 21 | [-1, -1], [-1, 0], [-1, 1], |
| 22 | [0, -1], [0, 1], |
| 23 | [1, -1], [1, 0], [1, 1] |
| 24 | ]; |
| 25 | |
| 26 | // Process each row |
| 27 | const result = input.map((row, i) => { |
| 28 | let resultRow = ''; |
| 29 | |
| 30 | // Process each cell in the row |
| 31 | for (let j = 0; j < row.length; j++) { |
| 32 | if (row[j] === '*') { |
| 33 | // If the cell is a flower, keep it as is |
| 34 | resultRow += '*'; |
| 35 | } else { |
| 36 | // Count adjacent flowers |
| 37 | let count = 0; |
| 38 | |
| 39 | // Check all 8 directions |
| 40 | for (const [dx, dy] of directions) { |
| 41 | const ni = i + dx; |
| 42 | const nj = j + dy; |
| 43 | |
| 44 | // Edge Case: Check if the adjacent cell is within bounds |
| 45 | if (ni >= 0 && ni < rows && nj >= 0 && nj < input[ni].length) { |
| 46 | if (input[ni][nj] === '*') { |
| 47 | count++; |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | // If no adjacent flowers, leave empty, otherwise show count |
| 53 | resultRow += count === 0 ? ' ' : count.toString(); |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | return resultRow; |
| 58 | }); |
| 59 | |
| 60 | return result; |
| 12 | 61 | }; |
| 62 | |
| 63 | // Handled Edge Cases: Empty input, rows with different lengths, adjacent cells out of bounds |