Codehs 8.1.5 Manipulating 2d Arrays ((top)) May 2026

array2D.splice(1, 1); // removes the row at index 1 To remove a column, you need to iterate through each row and remove the element:

for (var i = 0; i < array2D.length; i++) { for (var j = 0; j < array2D[i].length; j++) { console.log(array2D[i][j]); } } This code iterates through each element in the 2D array and logs its value to the console. Codehs 8.1.5 Manipulating 2d Arrays

A 2D array, also known as a matrix, is a data structure that consists of rows and columns, similar to a table or a spreadsheet. Each element in a 2D array is identified by its row and column index. In CodeHS, 2D arrays are used to represent a wide range of data, such as game boards, images, and matrices. array2D

To work with 2D arrays in CodeHS, you need to declare and initialize them first. Here’s an example of how to declare and initialize a 2D array: In CodeHS, 2D arrays are used to represent

for (var i = 0; i < array2D.length; i++) { array2D[i].splice(1, 1); // removes the column at index 1 } To iterate through a 2D array, you can use nested loops:

array2D[1][2] // returns 6

In this article, we’ve covered the basics of CodeHS 8.1.5 Manipulating 2D Arrays. We’ve discussed how to declare and initialize 2D arrays, access elements, perform common operations such as updating, adding,