463. Island Perimeter

Java

public class Solution {
    public int islandPerimeter(int[][] grid) {
        int count=0;
        for(int i=0;i=1&&grid[i-1][j]==1)
                tmp--;
                if(i=1&&grid[i][j-1]==1)
                tmp--;
                if(j

Javascript

/**
 * @param {number[][]} grid
 * @return {number}
 */
var islandPerimeter = function(grid) {
    var count=0;
        for(var i=0;i=1&&grid[i-1][j]==1)
                tmp--;
                if(i=1&&grid[i][j-1]==1)
                tmp--;
                if(j

优解，思路差不多，想法要好一点