01. 我们在CI4框架中的Model文件夹新建一个User_model.php的文件,使用的是getResultArray,表示并让数据以数组的方式返回查询结果,代码如下: <?php namespace App\Models\System; use CodeIgniter\Model; class User_model extends Model { var $Db; function __construct() { parent::__construct(); //创建数据库连接 $thi…
sqlite3本身并没有像pymysql一样原生提供字典形式的游标. cursor = conn.cursor(pymysql.cursors.DictCursor) 但官方文档里已经有预留了相应的实现方案. def dict_factory(cursor, row): d = {} for idx, col in enumerate(cursor.description): d[col[0]] = row[idx] return d 使用这个函数代替conn.raw_factory属性即可.…
Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] means the number in the i-th row and j-th column. Initially we have A[i, j] = 0 (1 <= i, j <= N). We can change the matrix in the following way. Given a rectangle whose upp…