Codehs 8.1.5 Manipulating 2d Arrays -

CodeHS 8.1.5, Manipulating 2D Arrays, requires updating the final element of three specific rows using a helper method to replace placeholder values. The task involves setting row values based on the length of the first array, the sum of specific row elements, and the total count of 2D array elements. For a full walkthrough and solution, visit

Solved 8.1.5 Manipulating 2D Arrays Please complete the code

I don't have direct access to CodeHS's specific problem statements or answer keys, but I can certainly help you understand how to manipulate 2D arrays in Java (since CodeHS Unit 8.1 is typically Java's 2D arrays). Codehs 8.1.5 Manipulating 2d Arrays

If you share the exact prompt or what the problem asks you to do, I can write the exact solution for you.

In the meantime, here's a general guide to common "Manipulating 2D Arrays" tasks in CodeHS 8.1.5 style problems: CodeHS 8

---

Traversal Pattern

for (int i = 0; i < matrix.length; i++)           // For each row
    for (int j = 0; j < matrix[0].length; j++)    // For each column in that row
        System.out.print(matrix[i][j] + " ");
System.out.println();

Modifying Elements

• To modify an element in a 2D array, you can assign a new value to the element using the assignment operator (=).
• The syntax for modifying an element is: array[row][column] = newValue.

Solutions:

function incrementAll(matrix) 
  for (let i = 0; i < matrix.length; i++) 
    for (let j = 0; j < matrix[i].length; j++) 
      matrix[i][j]++;
return matrix;
function getEvens(matrix) 
let result = [];
for (let i = 0; i < matrix.length; i++) 
let evenRow = [];
for (let j = 0; j < matrix[i].length; j++) 
if (matrix[i][j] % 2 === 0) 
evenRow.push(matrix[i][j]);
result.push(evenRow);
return result;

function swapFirstLastRow(matrix) 
if (matrix.length > 1) 
let temp = matrix[0];
matrix[0] = matrix[matrix.length - 1];
matrix[matrix.length - 1] = temp;
return matrix;
 Traversal Pattern 
  for (int i = 0; i &lt; matrix

---

Example Solution:

function sumBorder(matrix) 
  let sum = 0;
  let rows = matrix.length;
  let cols = matrix[0].length;
for (let i = 0; i < rows; i++) 
for (let j = 0; j < cols; j++)
return sum;

---

"Write a function that rotates the 2D array 90 degrees clockwise."