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Trigger change event using jquery
is there anyway i could trigger a change event on select box on page load and select a particular option.
8 Answers
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【基础入门班】【大作业】爱学习App - App Inventor 2 中文网 - 清泛IT社区...
方向1：实用的学习App
练习模式：
英中模式：随机出一个英语单词，答案隐藏，有按钮可以查看答案。可以切换上一、下一题。
中英模式：同上，题面是中文。自己不确定的题目，可一键收藏，随后可以专门练习收藏的题目...
代码块超1.2w，编译apk报错 - 用户反馈 - 清泛IT社区，为创新赋能！
代码块超1.2w，编译apk报错
直接保存，http头300多K
编译，生成yail，头1.2M
安全工具将程序标记为病毒 - App应用开发 - 清泛IT社区，为创新赋能！
可以肯定不是病毒，因为我也没有能力写出病毒，单纯的工厂生产计算程序，但安装时候，提示没有备案或国外软件，安全扫描标记为病毒，是因为没有备案码？问deepseek，说不应该是备案，程序采用注册机制，用数据库验证注...
显示1小时的倒计时代码怎么做 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
参考了显示60秒倒计时步骤，制作了一个程序，倒计时超过1分钟以上，依然是以秒倒计时，看起来倒计时数字很大。现在想实现1小时的倒计时，倒计时显示“时：分：秒”这样的显示方式。
例如：00:59:58 00:59:57 &nb...
How to subtract 30 days from the current datetime in mysql?
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SELECT * FROM table
WHERE exec_datetime BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW();
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-add
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Select Multiple Fields from List in Linq
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Anonymous types allow you to select arbitrary fields into data structures that are strongly typed later on in your code:
var cats = listObject
.Select(i => new { i.category_id, i.category_name })
.Distinct()
.OrderByDescending(i => i.c...
Using group by on multiple columns
..., to do with who is attending what subject at a university:
Table: Subject_Selection
+---------+----------+----------+
| Subject | Semester | Attendee |
+---------+----------+----------+
| ITB001 | 1 | John |
| ITB001 | 1 | Bob |
| ITB001 | 1 | Mickey |
| ITB001 ...
Avoid duplicates in INSERT INTO SELECT query in SQL Server
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Using NOT EXISTS:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
t1.name
FROM TABLE_1 t1
WHERE NOT EXISTS(SELECT id
FROM TABLE_2 t2
WHERE t2.id = t1.id)
Using NOT IN:
INSERT INTO TABLE_2
(id, name)
SELECT t1.id,
t1....
Is there any difference between GROUP BY and DISTINCT
...CT and distinct by UNION cause an oracle error, but GROUP BY worked; I was selecting only 1 column from a view and not using any aggregation; I'm still baffled why it required it, but it does confirm there is some difference in the execution. As others point out, it also lets you GROUP BY columns no...