v0.40: Create exercises. Challenge the community.

mirror_rows

Your mission

Implement mirror_rows, a function that reverses every row of a 2D list.

See it in action

mirror_rows([[8, 1, 4], [3, 5, 9]])

Expected result

[[4, 1, 8], [9, 5, 3]]

Your checklist

For your own tracking. Tests grade your code.

Create row_mirror.py.
Expose def mirror_rows(grid: list[list[int]]) -> list[list[int]]:.
Return a new 2D list where each row is reversed.
Keep the original row order.
Handle rectangular grids, single-row grids, empty rows, and an empty grid.
Do not mutate the input grid.

More examples

mirror_rows([[6], [], [7, 8]])

Expected result

[[6], [], [8, 7]]

Constraints

Expected files

row_mirror.py

Allowed functions

None. Write every helper yourself.

mirror_rows

Your mission

Implement mirror_rows, a function that reverses every row of a 2D list.

See it in action

mirror_rows([[8, 1, 4], [3, 5, 9]])

Expected result

[[4, 1, 8], [9, 5, 3]]

Your checklist

For your own tracking. Tests grade your code.

Create row_mirror.py.
Expose def mirror_rows(grid: list[list[int]]) -> list[list[int]]:.
Return a new 2D list where each row is reversed.
Keep the original row order.
Handle rectangular grids, single-row grids, empty rows, and an empty grid.
Do not mutate the input grid.

More examples

mirror_rows([[6], [], [7, 8]])

Expected result

[[6], [], [8, 7]]

Constraints

Expected files

row_mirror.py

Allowed functions

None. Write every helper yourself.

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01Rectangular gridWaiting

02Empty rowWaiting

03Empty gridWaiting

04Negative valuesWaiting

05Single rowWaiting

06Input grid is not mutatedWaiting

mirror_rows

Your mission

Implement mirror_rows, a function that reverses every row of a 2D list.

See it in action

mirror_rows([[8, 1, 4], [3, 5, 9]])

Expected result

[[4, 1, 8], [9, 5, 3]]

Your checklist

For your own tracking. Tests grade your code.

Create row_mirror.py.
Expose def mirror_rows(grid: list[list[int]]) -> list[list[int]]:.
Return a new 2D list where each row is reversed.
Keep the original row order.
Handle rectangular grids, single-row grids, empty rows, and an empty grid.
Do not mutate the input grid.

More examples

mirror_rows([[6], [], [7, 8]])

Expected result

[[6], [], [8, 7]]

Constraints

Expected files

row_mirror.py

Allowed functions

None. Write every helper yourself.

v0.40: Create exercises. Challenge the community.

Meet Studio →

mirror_rows

Your mission

Implement mirror_rows, a function that reverses every row of a 2D list.

See it in action

mirror_rows([[8, 1, 4], [3, 5, 9]])

Expected result

[[4, 1, 8], [9, 5, 3]]

Your checklist

For your own tracking. Tests grade your code.

Create row_mirror.py.
Expose def mirror_rows(grid: list[list[int]]) -> list[list[int]]:.
Return a new 2D list where each row is reversed.
Keep the original row order.
Handle rectangular grids, single-row grids, empty rows, and an empty grid.
Do not mutate the input grid.

More examples

mirror_rows([[6], [], [7, 8]])

Expected result

[[6], [], [8, 7]]

Constraints

Expected files

row_mirror.py

Allowed functions

None. Write every helper yourself.

Tests

Run the tests to grade your code

Build your code, then check each test here. Open a result to inspect its output.

Build

01Rectangular gridWaiting

02Empty rowWaiting

03Empty gridWaiting

04Negative valuesWaiting

05Single rowWaiting

06Input grid is not mutatedWaiting