Codehs 8.1.5 Manipulating 2d Arrays Review

In CodeHS, you can declare and initialize a 2D array using the following syntax:

for (var i = 0; i < arrayName.length; i++) { arrayName[i].push(newValue); } For example: Codehs 8.1.5 Manipulating 2d Arrays

arrayName[rowIndex][columnIndex] For example: In CodeHS, you can declare and initialize a

var myArray = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]; for (var i = 0; i < myArray.length; i++) { myArray[i].push(i + 1); } // myArray = [[1, 2, 3, 1], [4, 5, 6, 2], [7, 8, 9, 3]]; Removing a column from a 2D array can be done using a similar approach. You can use a loop to iterate over each row and remove the column value. i++) { arrayName[i].push(newValue)