Hello, and welcome, code explorer! Today's journey takes us through the intricate paths within a 2-dimensional array, often likened to a game board. Our mission is to identify ideal spots for game piece placement. Sounds like an adventure, doesn't it? Let's embark!

Visualize a chessboard in the form of a 2D array, where each cell could be marked E for empty or P for a piece. Our quest involves summoning a TypeScript function named findPositions(). This function is defined as function findPositions(board: string[][]): [number, number][]. Upon examining this 2D array, it identifies all the spots where a new piece could be placed so that it can move to another empty cell in one move. The catch is that a piece can move only to an immediately neighboring cell directly above, below, to the left, or right, but not diagonally.

Consider this 4x4 board, for instance:

The function should output the following pairs representing positions: (0, 1), (0, 2), (1, 2), (2, 1), (3, 1). This output represents the positions where a piece could be placed (empty) and then be able to move to a new empty spot in the next turn.

Stepping right into action, we start with an empty positions array to help us log the sought positions. Understanding the dimensions of our "board" paves the way for defining boundaries in our exploration mission. The array is initialized as . Additionally, we determine the size of the 2D array using the property.