ARTS 第一周（2019.9.16~2019.9.22）

[caimel]

Algorithm 旋转图像

• 题目：给定一个 n × n 的二维矩阵表示一个图像。将图像顺时针旋转 90 度。
• 思路：先做转置，再做翻转

/**
 * @param {number[][]} matrix
 * @return {void} Do not return anything, modify matrix in-place instead.
 */
var rotate = function(matrix) {
   var len = matrix.length;
		/***
		 * 先转置
		 */
		for (var i = 0; i < len; i++ ){
            for(var j = i; j < len; j++){
                var temp = matrix[i][j];
                matrix[i][j] = matrix[j][i];
                matrix[j][i] = temp;
            }
        }
        /***
	 * 后翻转
	*/
       for (var i = 0; i < len; i++) {
           for (var j = 0; j < len / 2; j++) {
               var temp = matrix[i][j];
               matrix[i][j] = matrix[i][len - j - 1];
               matrix[i][len - j - 1] = temp;
           }
       }
		return matrix;
};
var a = [
    [1,2,3],
    [4,5,6],
    [7,8,9]
];

		
var v = rotate(a);
		/***
		 * 打印矩阵
		 */
	console.log(v);

Review vue2组件通信-使用dispatch和broadcast

https://juejin.im/entry/5a4df4bd51882566e41669bd

Tip expr-eval的使用

https://github.com/silentmatt/expr-eval

Share vue引用handlebars模板引擎

https://github.com/caimel/vue2Experience/blob/master/vue%20%E5%BC%95%E7%94%A8handlebars%E6%A8%A1%E6%9D%BF%E5%BC%95%E6%93%8E.md