Rows in 2D arrays can have different lengths (ragged arrays). To find the last index of any row safely, always use array[row].length - 1 rather than a fixed number.
CodeHS Unit 8.1.5 focuses on working with two-dimensional arrays (2D arrays), a core data structure for representing grid-like data such as images, game boards, matrices, and spreadsheets. This text explains what 2D arrays are, common tasks you’ll perform, and clear, practical techniques for manipulating them. Codehs 8.1.5 Manipulating 2d Arrays
Elara never wanted to be a Gridkeeper. She wanted to paint nebulas, not debug the rigid, glowing lattice that powered the city of Veridian. But when the old Keeper, Master Thorne, caught her secretly feeding corrupted data into the city’s light fountains, he didn’t exile her. He made her his apprentice. Rows in 2D arrays can have different lengths (ragged arrays)
return result;
If you swap elements in the same loop where you iterate, you may double-swap. For column swaps, simply loop through rows; don't loop twice. This text explains what 2D arrays are, common
Rows in 2D arrays can have different lengths (ragged arrays). To find the last index of any row safely, always use array[row].length - 1 rather than a fixed number.
CodeHS Unit 8.1.5 focuses on working with two-dimensional arrays (2D arrays), a core data structure for representing grid-like data such as images, game boards, matrices, and spreadsheets. This text explains what 2D arrays are, common tasks you’ll perform, and clear, practical techniques for manipulating them.
Elara never wanted to be a Gridkeeper. She wanted to paint nebulas, not debug the rigid, glowing lattice that powered the city of Veridian. But when the old Keeper, Master Thorne, caught her secretly feeding corrupted data into the city’s light fountains, he didn’t exile her. He made her his apprentice.
return result;
If you swap elements in the same loop where you iterate, you may double-swap. For column swaps, simply loop through rows; don't loop twice.