Codehs 8.1.5 Manipulating 2d Arrays 【Legit 2026】

var array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; array.push([10, 11, 12]); // add new row console.log(array); // output: [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]

// Example: Doubling every value in the 2D array public void doubleArray(int[][] arr) for (int r = 0; r < arr.length; r++) for (int c = 0; c < arr[r].length; c++) arr[r][c] = arr[r][c] * 2; Use code with caution. 2. Searching and Replacing Codehs 8.1.5 Manipulating 2d Arrays

If you're stuck on a specific part of the code, I can help you debug it! Just let me know: What are you seeing (if any)? var array = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; array

Changing every instance of one number to another (e.g., turning all s in a game board). Mathematical Operations: var array = [[1

// myArray = [[1, 3], [4, 6], [7, 9]];

To remove a row from a 2D array, you can use the splice() method.