cursor

Position UI to mouse position (Make Tooltip panel follow cursor)

旧巷老猫 提交于 2020-01-11 10:19:06
问题 I made a tooltip panel follow the cursor with void Update () { this.transform.position = Input.mousePosition; } in the Update function. The panel "lags" behind, moving to cursor position after quarter of a second, and its kind of annoying Is there a better way of doing this? Can i somehow "glue" it to the cursor? Here is how it looks when i move mouse from right to left. Panel IS under the cursor when mouse is still, it only trails off when moved vigorously. 回答1: This is a known issue with

How to sort MergeCursor?

我的梦境 提交于 2020-01-11 03:59:06
问题 The task is to combine data from 2 different tables with similar columns, sorted by one column . Seems like MergeCursor might help, but have no idea how to sort items. The only solutions I see now is converting manually to ArrayAdapter, or do sneaky JOINs (not sure yet its possible) Thanks. 回答1: MergeCursor does not offer sorting. The only solutions I see now is converting manually to ArrayAdapter, or do sneaky JOINs (not sure yet its possible) I have no idea what the latter is. If you want

Update record of a cursor where the table name is a parameter

我怕爱的太早我们不能终老 提交于 2020-01-11 02:36:19
问题 I am adjusting some PL/pgSQL code so my refcursor can take the table name as parameter. Therefore I changed the following line: declare pointCurs CURSOR FOR SELECT * from tableName for update; with this one: OPEN pointCurs FOR execute 'SELECT * FROM ' || quote_ident(tableName) for update; I adjusted the loop, and voilà, the loop went through. Now at some point in the loop I needed to update the record (pointed by the cursor) and I got stuck. How should I properly adjust the following line of

A few questions about SQLite database cursors in Android

时光总嘲笑我的痴心妄想 提交于 2020-01-09 19:35:50
问题 To implement database access in my application I followed Lars Vogel tutorial, but I'm very confused about a couple of things... 1) Every time a call is made to fetchTodo a new cursor will be created and returned. Leaving the previous cursor for the garbage collector. So, if I don't use startManagingCursor or even the CursorLoader for that matter, should I call a .close() on the cursor when I'm done with it ? Outside of fetchTodo scope of course, example: Cursor cursor = mNotesAdapter

A few questions about SQLite database cursors in Android

安稳与你 提交于 2020-01-09 19:35:30
问题 To implement database access in my application I followed Lars Vogel tutorial, but I'm very confused about a couple of things... 1) Every time a call is made to fetchTodo a new cursor will be created and returned. Leaving the previous cursor for the garbage collector. So, if I don't use startManagingCursor or even the CursorLoader for that matter, should I call a .close() on the cursor when I'm done with it ? Outside of fetchTodo scope of course, example: Cursor cursor = mNotesAdapter

pygame库的学习

二次信任 提交于 2020-01-08 08:37:51
第一天:我学习了如何设置窗口和加载图片,以及加载音乐。这个库真的很有意思啊,打算py课设就拿这个写了。 代码: import pygame background_image_filename = 'taylor.jfif' mouse_image_filename = 'mouse.jpg' from pygame.locals import * from sys import exit pygame.init() pygame.mixer.init() screen = pygame.display.set_mode([1000, 600], 0, 32) pygame.mixer.music.load('tay.mp3') pygame.mixer.music.play() pygame.display.set_caption("My dear taylor") background = pygame.image.load(background_image_filename).convert() mouse_cursor = pygame.image.load(mouse_image_filename).convert_alpha() while True: for event in pygame.event.get(): if event.type == pygame

pymysql

微笑、不失礼 提交于 2020-01-07 22:41:27
*/ /*--> */ 目录 About pymysql Install 准备 建立连接 创建数据库 快速上手之增删改查 增 删 改 查 SQL注入 事物 存储过程 返回Python目录 返回测试目录 返回随笔首页 About pymysql 返回顶部 在Python2.x中,Python连接MySQL服务器使用mysqldb库,但是它只支持到Python2.x,在Python3.x中由pymysql模块代替。 PyMySQL 遵循 Python 数据库 API v2.0 规范,并包含了 pure-Python MySQL 客户端库。 Install 返回顶部 pip install pymysql # 备用地址 pip install -i https://pypi.doubanio.com/simple pymysql 准备 返回顶部 在正式操作前,这里默认你有了一个良好的环境,包括MySQL服务,Python环境。 建立连接 返回顶部 import pymysql conn = pymysql.connect( host='localhost', # 连接的服务器ip user='username', # 用户名 password='password', # 密码 database='day31', # 你想连接的数据库 charset='utf8' # 指定字符编码

Iterator

我与影子孤独终老i 提交于 2020-01-07 18:31:09
迭代对于我们搞Java的来说绝对不陌生。我们常常使用JDK提供的迭代接口进行Java集合的迭代。 Iterator iterator = list.iterator(); while(iterator.hasNext()){ String string = iterator.next(); //do something } 迭代其实我们可以简单地理解为遍历,是一个标准化遍历各类容器里面的所有对象的方法类,它是一个很典型的设计模式。Iterator模式是用于遍历集合类的标准访问方法。它可以把访问逻辑从不同类型的集合类中抽象出来,从而避免向客户端暴露集合的内部结构。 在没有迭代器时我们都是这么进行处理的。如下: 对于数组我们是使用下标来进行处理的: int[] arrays = new int[10]; for(int i = 0 ; i < arrays.length ; i++){ int a = arrays[i]; //do something } 对于ArrayList是这么处理的: List<String> list = new ArrayList<String>(); for(int i = 0 ; i < list.size() ; i++){ String string = list.get(i); //do something } 对于这两种方式

python 连接 MySQL 数据库

烂漫一生 提交于 2020-01-07 14:31:19
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> import pymysql # ==== 获取数据库中的数据 ==== # 打开数据库连接 IP 用户 密码 数据库名称 编码 db = pymysql.connect("localhost","root","123456","iweb", charset="utf8") # 使用cursor()方法获取操作游标 cursor = db.cursor() # SQL 查询语句 sql = "select * from iwebshop_category where parent_id=0 and visibility=1 order by sort" # 执行SQL语句 cursor.execute(sql) # 获取所有记录列表 results = cursor.fetchall() cate_names = [i[1] for i in results] # 关闭数据库连接 db.close() 免费下载试用: https://support.i-search.com.cn/ 来源: oschina 链接: https://my.oschina.net/u/4248887/blog/3154367

MySQL与python交互

回眸只為那壹抹淺笑 提交于 2020-01-07 11:55:11
1. 准备数据 创建数据表 -- 创建 "京东" 数据库 create database jing_dong charset=utf8; -- 使用 "京东" 数据库 use jing_dong; -- 创建一个商品goods数据表 create table goods( id int unsigned primary key auto_increment not null, name varchar(150) not null, cate_name varchar(40) not null, brand_name varchar(40) not null, price decimal(10,3) not null default 0, is_show bit not null default 1, is_saleoff bit not null default 0 ); 插入数据 -- 向goods表中插入数据 insert into goods values(0,'r510vc 15.6英寸笔记本','笔记本','华硕','3399',default,default); insert into goods values(0,'y400n 14.0英寸笔记本电脑','笔记本','联想','4999',default,default); insert into goods