Matrix (2D Arrays)

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Overview

A matrix in data structures usually means a 2D array: a grid of values arranged in rows and columns.

Suppose we are at Row 2, Col 3 and want to move two steps up.

[
  [0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0],
  [0, 0, 0, 1, 0, 0],
  [0, 0, 0, 0, 0, 0],
];

Apply the Up move (-1, 0) twice: subtract 1 from the row two times while keeping the column the same.

[
  [0, 0, 0, 1, 0, 0],
  [0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 0],
];

The new position is Row 0, Col 3.

⌘I