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RadioButton单选按钮扩展集合 · App Inventor 2 中文网
...建 Apps 首页 教育 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 ...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...只能运行于安卓设备上，对于iOS设备需要使用swift开发iOS版本的拓展。
环境配置
安装好 Java开发环境 以及 Ant编译环境，这里以Windows为例，供参考：
安装完JDK后配置环境变量 计算机（右键）→属性→高级系统设置→...
How to solve “Plugin execution not covered by lifecycle configuration” for Spring Data Maven Builds
...tId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
...
Rails update_attributes without save?
...
assign_attributes is available from Rails 3.1 onwards, so you can't use it if you're still running an old version of Rails.
– Haegin
Dec 6 '12 at 11:55
...
Android: How to bind spinner to custom object list?
...in the Spinner list.
}
}
res/layout/spinner.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:textSiz...
How do I put a border around an Android textview?
...e in your drawable folder (for example, my_border.xml):
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >
<!-- View background color -->
<solid
android:color="@color/backgrou...
How can I build a small operating system on an old desktop computer? [closed]
...ther a command line O/S, and a graphical one?
With grief. Look up Windows 3.1 and Linux, in particular X windows.
What is a graphical O/S built on? Like, how would I do something like, a command line, with a font, and a picture at the top?
Look up X windows.
final advice: study linux/x windo...
Windows batch files: .bat vs .cmd?
...ion). cmd.exe was never part of Windows 9x. It originated in OS/2 version 1.0, and the OS/2 version of cmd began 16-bit (but was nonetheless a fully fledged protected mode program with commands like start). Windows NT inherited cmd from OS/2, but Windows NT's Win32 version started off 32-bit. Alt...
Simple Digit Recognition OCR in OpenCV-Python
... you! There are a few changes needed to get this to work with the latest (3.1) versjon of OpenCV: contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE) => _,contours,hierarchy = cv2.findContours(thresh,cv2.RETR_LIST,cv2.CHAIN_APPROX_SIMPLE), model = cv2.KNearest() ...
Package objects
...ckage object bar {
// package wide constants:
def BarVersionString = "1.0"
// or type aliases
type StringMap[+T] = Map[String,T]
// can be used to emulate a package wide import
// especially useful when wrapping a Java API
type DateTime = org.joda.time.DateTime
type JList[T] = ja...