一道面试题:有一个多维数组,请从前往后、从后往下、从下往前、从前往上,螺旋遍历这个数组,遍历过的元素不需要在遍历。
例如:
[
[1,2,3,4,5,6],
[7,8,9,10,11,12],
[13,14,15,16,17,18],
[19,20,21,22,23,24],
]
输出:
[1,2,3,4,5,6,12,18,24,23,22,21,20,19,13,7,8,9,10,11,17,16,15,14]
展开
4