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App Inventor 2 ECharts 拓展：画饼图 - App应用开发 - 清泛IT社区，为创新赋能！
...，请点击右侧“文档反馈”进行反馈！ ECharts 拓展 使用AppInventor2布局进行展示的图表拓展，基于ECharts强大的js图表库开发，持续提供酷炫实用的图表展示。饼图 效果如下：设置透明背景属性后，效果如下：代码块如下：图表导...
App Inventor 2 ECharts 拓展：画仪表图 - App应用开发 - 清泛IT社区，为创新赋能！
仪表图 效果如下：代码如下：
Gauge(startAngle,endAngle,min,max,value)画仪表图。startAngle：起始角度； endAngle：结束角度； min：最小值； max：最大值； value：当前值。角度值参考如下：
来源：https://www.fun123.cn/reference/extensions/ECharts.h...
app inventor 2 有HexToString组件吗？ - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
同这篇帖子《什么是 Hex 编码方式？》：https://bbs.tsingfun.com/thread-2700-1-1.html
使用 ByteArray 拓展 的 ToHex 方法可以实现将无符号数字转换为其十六进制表示。
App Inventor 2 OCR 图片文字识别方案 - App应用开发 - 清泛IT社区，为创新赋能！
本想写个离线拓展方案，使用开源库 Tess4j，官网：https://tess4j.sourceforge.net。这个开源项目是C++的，使用JNI桥接技术，折腾了2天，效果不好，多平台兼容（模拟器，安卓，旧版安卓等），离线模型体积大，编译apk有问题，jni加载....
Impossible to Install PG gem on my mac with Mavericks
...
If you want to avoid using MacPorts, you can download the Postgres App and place it into the Application directory.
Then, specify the location of newly downloaded pg_config:
gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/latest/bin/pg_config
If you run i...
Creating a config file in PHP
...it properly. For example, it is possible to create an INI file like this:
app.ini
[database]
db_name = mydatabase
db_user = myuser
db_password = mypassword
[application]
app_email = mailer@myapp.com
app_url = myapp.com
So the only thing you need to do is call:
$ini = parse_ini_file('...
How do I get Flask to run on port 80?
...ng development, but you should use a full deployment option for production applications. (Do not use the builtin development server in production.)
Recommended
Proxy HTTP traffic through apache2 to Flask.
This way, apache2 can handle all your static files (which it's very good at - much better...
How to run `rails generate scaffold` when the model already exists?
...'parent_module/controller_name'.
This generates a controller class in app/controllers and invokes helper,
template engine and test framework generators.
To create your resource, you'd use the resource generator, and to create a migration, you can also see the migration generator (see, t...
Best way to create custom config options for my Rails app?
I need to create one config option for my Rails application. It can be the same for all environments. I found that if I set it in environment.rb , it's available in my views, which is exactly what I want...
...
Cannot generate iOS App archive in xcode
I have a problem generating a iOS App archive from an application. The application compiles just fine and even works in the simulator. Now I wanted to make som ad hoc testing and cannot generate the iOS App Archive. When I click on the Product -> Archive it generates a generic xcode archive. Can an...