How to use

keysArray

function

in

Set

/**
 * Returns true if coordinates are within grid bounds.
 *
 * @param {array} grid
 * @param {Set} coordinateSet - set of [row,col] coordinates for given block
 */
export function isWithinGridBounds(grid, coordinateSet) {
  return coordinateSet.keysArray().every(([row, col]) => {
    return row >= 0 && row < grid.length && col >= 0 && col < grid[0].length;
  });
}

/**
 * Returns true if the given block's position does not collide
 * with another block on the grid.
 *
 * Note: if the block is out of grid bounds,
 * it is technically NOT colliding with an existing block,
 * and so this will return true.
 *
 * @param {array} grid - matrix
 * @param {Set} coordinateSet - set of [row,col] coordinates for given block
 */
export function hasNoBlockCollisions(grid, coordinateSet) {
  return coordinateSet.keysArray().every(([row, col]) => {
    return grid[row] === undefined || grid[row][col] === null;
  });
}