Bug Report for matrixBFS

[hsiwkin]

Bug Report for [Matrix BFS Problem on NeetCode.io](https://neetcode.io/problems/matrixBFS)

Issue

The initial element of the provided grid (grid[0][0]) is NaN when executing JavaScript code.

Observed Behavior

Executing the JavaScript code snippet below results in the grid's first element becoming NaN:

class Solution {
    /**
     * @param {number[][]} grid
     * @returns {number}
     */
    shortestPath(grid) {
        console.log(grid);
    }
}

Output:

[
  [ NaN, 0, 0, 0 ],
  [ 1, 1, 0, 0 ],
  [ 0, 0, 0, 1 ],
  [ 0, 1, 0, 0 ]
]

Expected Behavior

The grid provided should contain valid numeric values (0 or 1) without any NaN values.

Steps to Reproduce

1. Visit the [Matrix BFS problem page](https://neetcode.io/problems/matrixBFS).
2. Paste the JavaScript snippet provided above into the solution editor.
3. Execute the code and observe the output.

Environment

• Browser: Chrome Version 134.0.6998.119
• Operating System: MacOS Sequoia 15.3.2 (24D81)
• Platform: JavaScript playground on Neetcode.io