48. Rotate Image
You are given an n x n 2D matrix representing an image.
Rotate the image by 90 degrees (clockwise).
Note:
You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation.
Example 1:
Given input matrix = [ ?[1,2,3], ?[4,5,6], ?[7,8,9]],rotate the input matrix in-place such that it becomes:[ ?[7,4,1], ?[8,5,2], ?[9,6,3]]
Example 2:
Given input matrix =[ ?[ 5, 1, 9,11], ?[ 2, 4, 8,10], ?[13, 3, 6, 7], ?[15,14,12,16]], rotate the input matrix in-place such that it becomes:[ ?[15,13, 2, 5], ?[14, 3, 4, 1], ?[12, 6, 8, 9], ?[16, 7,10,11]]
题意：顺时针旋转二维数组
代码如下：
/** * @param {number[][]} matrix * @return {void} Do not return anything, modify matrix in-place instead. */var rotate = function(matrix) { ???matrix=matrix.reverse(); ??????for(var i=0;i<matrix.length;i++){ ???????for(var j=i;j<matrix[0].length;j++){ ??????????var temp=matrix[i][j] ??????????matrix[i][j]=matrix[j][i]; ???????????matrix[j][i]=temp; ???????} ???}};48. Rotate Image（js）
原文地址：https://www.cnblogs.com/xingguozhiming/p/10428453.html