var myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; for (var i = 0; i < myArray.length; i++) { myArray[i].splice(1, 1); } // myArray = [[1, 3], [4, 6], [7, 9]];

var myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; myArray.push([10, 11, 12]); // myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]; Removing a row from a 2D array can be done using the splice() method.

In the world of programming, arrays are a fundamental data structure used to store and manipulate collections of data. In CodeHS, a popular online platform for learning programming, 2D arrays are a crucial concept that can be a bit tricky to grasp at first. However, with practice and patience, you can master the art of manipulating 2D arrays. In this article, we'll dive into the world of 2D arrays in CodeHS, specifically focusing on exercise 8.1.5, "Manipulating 2D Arrays."

arrayName[rowIndex][columnIndex] = newValue; For example:

Now that we've covered the basics, let's move on to the fun part – manipulating 2D arrays! In exercise 8.1.5, you'll learn how to perform various operations on 2D arrays. To access an element in a 2D array, you need to specify its row and column index. The syntax is as follows:

Codehs 8.1.5 Manipulating 2d Arrays May 2026

var myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; for (var i = 0; i < myArray.length; i++) { myArray[i].splice(1, 1); } // myArray = [[1, 3], [4, 6], [7, 9]];

arrayName[rowIndex][columnIndex] = newValue; For example: However, with practice and patience, you can master