Island Perimeter
In this lab, you are given a row x col
grid
representing a map where grid[i][j] = 1
represents land and grid[i][j] = 0
represents water. Your task is to determine the perimeter of the island.
The grid cells are connected horizontally or vertically (not diagonally). The grid
is completely surrounded by water, and there is exactly one island (i.e., one or more connected land cells).
The island doesn't have "lakes", meaning the water inside isn't connected to the water around the island. One cell is a square with side length 1. The grid is rectangular, width and height don't exceed 100.
Examples
Example 1:
Input: grid = [[0,1,0,0],[1,1,1,0],[0,1,0,0],[1,1,0,0]] Output: 16
In this example, the perimeter is formed by the 16 yellow stripes in the image above.
Example 2:
Input: grid = [[1]] Output: 4
This island consists of a single land cell, and its perimeter is 4.
Example 3:
Input: grid = [[1,0]] Output: 4
In this case, the island consists of a single land cell, and the perimeter is still 4.
Constraints
row == grid.length
col == grid[i].length
1 <= row, col <= 100
grid[i][j]
is0
or1
. There is exactly one island in
grid
.
Challenges

Export the
islandPerimeter
function. Make sure to export theislandPerimeter
function using ESM export syntax. The function takesgrid
as an argument and returns the island's perimeter as a number. 
Calculate the island's perimeter. Implement the
islandPerimeter
function to correctly calculate the island's perimeter based on the given inputgrid
. 
Handle edge cases. Ensure your implementation handles various edge cases like empty grid, grid with a single row or column, and so on.