cursor

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm working on a stored procedure that uses a cursor on a temporary table (I have read a bit about why cursors are undesirable, but in this situation I believe I still need to use one). In my procedure I need to step through the rows of the table twice. Having declared the cursor, already stepped through the temporary table once and closed the cursor, would the position of the cursor remain at the end of the table when re-opened or does it reposition itself to the initial starting position (ie: before the first row)? Alternatively, to

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm looking to create and handle a cursor in python the way cursors natively work in mongo. I know the intended way is to do 'result = collection.find()' and do a 'for record in result' but I'm looking to wrap iteration functionality in a class. I'd like to be able to create a new class object and call a function e.g. init_cursor() to make a db connection and do a find returning a cursor. I would then like the have a get_next() function that would move to the next result and set class data members based on the result. Here's the pesudo-code:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I googled and found several answers but they was all about click or mousemove events which are not suitable for my question. Basically I allow users to drag an item from a list and drop it on a folder in another list and I want to highlight element (in the folder list) whenever an item is dragging over it. Listening to mouseenter and mouseleave events on the folder list won't work. I tried with document.elementFromPoint in the dragging event (jQuery UI's Draggable drag) but unfortunately it returns the helper element instead of the element

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: W/CursorWindow(15677): Window is full: requested allocation 2195889 bytes, free space 2096720 bytes, window size 2097152 bytes I know there is app memory avaliable: D/dalvikvm(15677): GC_FOR_ALLOC freed 9K, 30% free 17050K/24291K, paused 45ms So its purely to do with the cursor size window, when Reading blob into byte[] . Im using the built in method to read blobs from a cursor. try { c = rdb.query("Photos", new String[]{"photo"}, "id = ?", new String[]{""+photoID}, null, null, null); if(c.moveToFirst()) { byte[] tArray = c.getBlob(c

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: :30 will move my cursor to the beginning of line 30. How can I tell Vim to place the cursor at line y, column x? Is this possible without using the arrow keys or h , j , k , l keys? I am running Vim version 7.3.429. 回答1: Try a number followed by a pipe to get to the specified column in that line. 80| should get you to position 80 in that line. EDIT: If you are looking to go to a specific x,y position, I am not sure on that one. 回答2: Not sure it's in any way more convenient, but you can call the cursor function directly: :cal cursor(30, 5)

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to create gui calculator with an undecorated stage. I added an Hbox as the title bar and set gave it an onClicked/OnDragged methods to move the primary stage around when dragged, however it doesn't seem to work perfectly. because 1) When i press and start dragging, the mouse cursor moves to the top left corner of the window as you can see below. The method i used is from here X IMAGES: When i click on middle of Hbox Where the cursor moves when i start dragging X Here is my main class public void start(Stage primaryStage) throws

针对计步器的基本需求功能如下： 1.通过传感器得到步数 2.通过数据库储存步数 3.从数据库调出相应数据显示步数 分析ios系统自带健康软件中的计步器，数据显示为： 1.步行+跑步距离 2.步数 3.已爬楼层 其中每项显示均包含日、周、月、年的数据柱形图显示和对应时长的平均值显示，并能显示所有数据的具体时间和数值。 当传感器的值发生变化时，会调用onSensorChanged方法。当传感器的精度变化时会调用onAccuracyChanged方法。onSensorChanged方法里根据stepSensor（计步传感器类型 0-counter 1-detector）的类型设置StepDcretor.CURRENT_SETP的值，然后调用updateNotification方法更新通知栏。在onCreate方法里看到，首先获取了当前的日期，然后初始化一个广播接收者，接着开启子线程执行startStepDetector方法。 先看addCountStepListener方法，API版本大于19执行这个方法，首先先拿到两种传感器，TYPE_STEP_COUNTER 计步传感器，用于记录激活后的步伐数。TYPE_STEP_DETECTOR 步行检测传感器，用户每走一步就触发一次事件。根据拿到的情况来注册监听，sensorManager.registerListener(StepService

不带参数的游标 DECLARE cursor my_cursor is select xh from xs; v_xh xs.xh%type; begin open my_cursor; fetch my_cursor into v_xh; dbms_output.put_line(v_xh); dbms_output.put_line(my_cursor%rowcount); exception when others then dbms_output.put_line(sqlcode||sqlerrm); end; 带参数的游标 DECLARE varId NUMBER; varName VARCHAR2(50); cursor my_cursor(v_xb xs.xb%type) is select xh,xm from xs where xb=xs.xb; begin open my_cursor('男'); fetch my_cursor into varId,varName; dbms_output.put_line('学生编号:'||varId||'学生姓名:'||varName); dbms_output.put_line(my_cursor%rowcount); close my_cursor; exception when others then dbms

本文分享了一个电话黑名单的小项目，下面是具体的实现： 1.添加黑名单。 2.判断如果是黑名单，就对其拦截。 添加黑名单： 往数据库里面添加黑名单，手机号码，用的是ContentProvider进行添加的（当然，这里是完全没有必要用这个的） 第一步： 新建一个MyContentProvider继承自ContentProvider，并重写其中的方法： package com . wind . safecall . contentprovider ; import android . content . ContentProvider ; import android . content . ContentUris ; import android . content . ContentValues ; import android . content . Context ; import android . content . UriMatcher ; import android . database . Cursor ; import android . database . sqlite . SQLiteDatabase ; import android . database . sqlite . SQLiteOpenHelper ; import android . net .

Ŀ¼ import pymysql conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', passwd='123456', db='s8day127db') cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) # cursor.execute("select id,name from users where name=%s and pwd=%s",['lqz','123',]) cursor.execute("select id,name from users where name=%(user)s and pwd=%(pwd)s",{'user':'lqz','pwd':'123'}) obj = cursor.fetchone() conn.commit() cursor.close() conn.close() print(obj) 为每个线程创建一个连接，线程即使调用了close方法，也不会关闭，只是把连接重新放到连接池，供自己线程再次使用。当线程终止时，连接自动关闭 from DBUtils.PersistentDB import PersistentDB import pymysql POOL = PersistentDB(