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App Inventor 2有没有代码注释功能？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
Q：App Inventor 2有没有代码注释功能？就是比如说如果你要用visual studio的话，就是会有一些不用的代码就可以注释掉。有一些模块其实暂时不用的话可以注释。
A：有代码注释功能，在AppInventor中是“禁用代码块”，如下：
...
怎么通过app inventor接收mqtt平台推送的长消息 - App Inventor 2 中文网 -...
...一个门禁系统，把摄像头采集的图片通过MQTT平台发送给app inventor我的手机现在可以接收到短消息，这个BASE64编码数据直接接收不到，一点反应也没有。13582001974 发表于 2024-09-29 20:08
我的手机现在可以接收到短消息，这个BASE64编...
APP Inventor 空字符串怎么表示？ - App应用开发 - 清泛IT社区，为创新赋能！
Q：APP Inventor 空字符串怎么表示？
A：文本下的字符串，不填写任何内容，就是空字符串。
详见文档：https://www.fun123.cn/reference/blocks/text.html#string
如何设置App不随着屏幕旋转而旋转？ - App Inventor 2 中文网 - 清泛IT社区...
Q：如何设置App不随着屏幕旋转而旋转？
A：Screen1 的属性中设置屏幕方向为“锁定竖屏”就可以啦！
学习到了！！
调研结论：File组件写log文件大小有上限吗？会无限增长吗？（附日志轮转方...
...xt文件大小有上限吗？会不会一直涨？
最近有客户问：App里用文件管理器组件持续写log.txt记录运行日志，这个文件会不会无限变大？有没有大小上限？我把官方文档和源码翻了一遍，结论如下。
一、结论先行
File组件本...
Laravel Migration Change to Make a Column Nullable
...hnique such as writing a raw SQL command. For example:
// getting Laravel App Instance
$app = app();
// getting laravel main version
$laravelVer = explode('.',$app::VERSION);
switch ($laravelVer[0]) {
// Laravel 4
case('4'):
DB::statement('ALTER TABLE `pro_categories_langs` MODI...
.gitignore for PhoneGap/Cordova 3.0 projects - what should I commit?
...
The answer depends on wich platforms you're developing the phongap app, and if you're following the standard directory structure.
If your project directory structure is standard, then you can start from this gitignore and modify it for your needs.
On a rule of thumb you've to exclude all g...
Recommendations of Python REST (web services) framework? [closed]
...sage
render_txt = lambda message: message
urls = (
'/(.*)', 'greet'
)
app = web.application(urls, globals())
class greet:
@mimerender(
default = 'html',
html = render_html,
xml = render_xml,
json = render_json,
txt = render_txt
)
def GET(se...
How do I enable file editing in Visual Studio's debug mode?
...ues execution of the program (F10, F5, etc ...) will cause the edits to be applied to the running program. If this succeeds the execution of the program will continue with the new code applied.
The debugger does not allow edits to the file if ENC is not enabled.
There are a few reasons ENC may ...
Hidden Features of Java
...c name for creating an anonymous inner class, glossing over what's really happening and making it sound as if inner classes were intended to be used this way. This is a pattern I'd prefer remain hidden.
– erickson
Oct 23 '08 at 14:27
...