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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ect two-finger rotation gestures performed on a Canvas. The demo app here, called rotationSprite, is a simple demonstration of detecting rotation gestures. You can download the apk file of the demo app from here. The demo app simply illustrates how to use the RotationDetector component to rotate a...
JavaScript loop through json array?
...ty(key)) {
console.log(data[key].id);
}
}};
You can call it like this
iterateData(data); // write 1 and 2 to the console
Update after Erics comment
As eric pointed out a for in loop for an array can have unexpected results. The referenced question has a lengthy discussion ...
MySQL Fire Trigger for both Insert and Update
...gers, but you can move the common code into a procedure and have them both call the procedure.
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OAuth secrets in mobile apps
... with the OAuth design that we are facing ourselves. We opted to proxy all calls through our own server. OAuth wasn't entirely flushed out in respect of desktop apps. There is no prefect solution to the issue that I've found without changing OAuth.
If you think about it and ask the question why we...
What is the purpose of Flask's context stacks?
..."backend". In other words, the Flask(...) application constructor has been called twice, creating two instances of a Flask application.
Contexts
When you are working with Flask, you often end up using global variables to access various functionality. For example, you probably have code that reads....
405 method not allowed Web API
...
Chrome often times tries to do an OPTIONS call before doing a post. It does this to make sure the CORS headers are in order. It can be problematic if you are not handling the OPTIONS call in your API controller.
public void Options() { }
...
Android. Fragment getActivity() sometimes returns null
...et NullPointerException in fragment class when the getActivity() method is called.
8 Answers
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菜单的背景颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...gs, CPoint point)
{
// TODO: Add your message handler code here and/or call default
CMenu *Menu=GetMenu();
ClientToScreen(&point);//将窗口坐标转换成屏幕坐标
Menu->GetSubMenu(0)->TrackPopupMenu(
TPM_LEFTBUTTON|TPM_VERTICAL,point.x,point.y,this);
Menu->Detach();
CDial...
Draw in Canvas by finger, Android
...our onDraw() you draw the paths using the paint of your choice. You should call invalidate() to refresh the view.
To choose options you can click menu and choose the options.
The below can be used as a reference. You can modify the below according to your needs.
public class FingerPaintActivity e...
Is it possible to use raw SQL within a Spring Repository
...import javax.persistence.EntityManager;
Now your main class, you have to call this function. First get EntityManager and call this getUserByRoll(EntityManager entityManager,String rollNo) function. Calling procedure is given bellow:
Here is the Imports
import javax.persistence.EntityManager;
im...