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【教学】AppInventor2人工智能应用：Personal Audio Classifier 自行训练神...
繁体中文原文：https://blog.cavedu.com/2020/04/ ... nalaudioclassifier/
AI 行動化（AI on mobile）呼應了人類生活早已離不開手機的事實，另一方面，手機處理晶片速度一日千里，今天跑不動的東西，很快就不再是問題。對於 AI 這個議題，...
用户反馈文本输入框光标问题 - 用户反馈 - 清泛IT社区，为创新赋能！
还有一个问题，我用老巫婆那个网站 和现在的同样工程对比如下 ： 1、老巫婆光标会自动退出 2、老巫婆串口通信350MS一次 不会死机 现在的1000MS 才不会死机.
感觉使用起来， 没有他那个网站好...
求助！关于拓展模块NotificationStyle的demo运行时报错的问题 - App Invent...
我使用的是demo程序进行测试，拓展程序链接：
https://www.fun123.cn/reference/extensions/NotificationStyle.html
结果无论点什么按键都会报错：
edu.mit.appinventor.aicompanion3: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be...
SQLite 拓展查询数据表，带条件过滤 - App应用开发 - 清泛IT社区，为创新赋能！
SQLite 拓展导入，新建库、表等详见文档：https://www.fun123.cn/reference/extensions/SQLite.html
本文详细介绍一下，SQLite 的查询功能，以及带where条件的查询功能。
空表的情况下，先插入6条数据：
引入 TableView 拓展，用户展示查...
Difference between View and table in sql
...
A table contains data, a view is just a SELECT statement which has been saved in the database (more or less, depending on your database).
The advantage of a view is that it can join data from several tables thus creating a new view of it. Say you have a database w...
Add an already existing directory to a directory in Solution Explorer
...tory in Solution Explorer, but whenever I right-click on the directory and select Add => Existing Item , I can only add individual files, but not directories.
...
Why can't radio buttons be “readonly”?
...ton by disabling only the un-checked radio buttons. It keeps the user from selecting a different value, and the checked value will always post on submit.
Using jQuery to make readonly:
$(':radio:not(:checked)').attr('disabled', true);
This approach also worked for making a select list readonly, ...
How to see full query from SHOW PROCESSLIST
... pull the data and look at 'INFO' column which contains the whole query :
select * from INFORMATION_SCHEMA.PROCESSLIST where db = 'somedb';
You can add any condition or ignore based on your requirement.
The output of the query is resulted as :
+-------+------+-----------------+--------+--------...
PostgreSQL: insert from another table
...
Just supply literal values in the SELECT:
INSERT INTO TABLE1 (id, col_1, col_2, col_3)
SELECT id, 'data1', 'data2', 'data3'
FROM TABLE2
WHERE col_a = 'something';
A select list can contain any value expression:
But the expressions in the select list do...
How to fix .pch file missing on build?
...the bottom of the drop-down menu.
At the top left of the Properties Pages,
select All Configurations from the drop-down menu.
Open the C/C++ tree and select Precompiled Headers
Precompiled Header: Select Use (/Yu)
Fill in the Precompiled Header File field. Standard is stdafx.h
Click Okay
If you do n...