一个关于javascript二维数组的面试题

Question

题目是这样的：给定一个二维数组，实现一个功能函数 fn，向这个函数中传递这个二维数组的一个坐标，如果这个坐标的值为 ”1“，将返回和这个坐标所有相连的并且坐标值为1坐标。例如,传递了 fn([3,4])得到的结果为：[[3,4],[4,4],[5,4],[6,4],[7,4],[8,4],[8,5],[8,6]]var arr =[    [0,0,0,0,0,0,0,0,0,0,0],    [0,0,0,0,0,0,0,0,0,0,0],    [0,0,0,0,0,0,0,0,0,0,0],    [0,0,0,0,1,0,0,0,1,0,0],    [0,0,0,0,1,0,0,0,1,0,0],    [0,0,0,0,1,0,0,0,1,0,0],    [0,0,0,0,1,0,0,0,0,0,0],    [0,0,0,0,1,0,0,0,0,0,0],    [0,0,0,0,1,1,1,0,0,0,0],    [0,0,0,0,0,0,0,0,0,0,0],    [0,0,0,0,0,0,0,0,0,0,0],] ;