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App Inventor 2 连接方式：AI伴侣、模拟器、USB · App Inventor 2 中文网
...那么及时，也就是新增的功能需要一段时间后才能更新到iOS版中。
其次，使用了拓展的App一律不支持iOS版AI伴侣的测试，因为拓展目前都是java写的安卓平台程序，可能未来待iOS平台成熟后，会有swift苹果版拓展。
视频演示
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How do I update pip itself from inside my virtual environment?
...-managed packages, but how do I update pip itself? According to pip --version , I currently have pip 1.1 installed in my virtualenv and I want to update to the latest version.
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How do I shuffle an array in Swift?
...thm (Fisher-Yates) in Swift 4.2+ and how to add the same feature in the various previous versions of Swift. The naming and behavior for each Swift version matches the mutating and nonmutating sorting methods for that version.
Swift 4.2+
shuffle and shuffled are native starting Swift 4.2. Example u...
How to add 2 buttons into the UINavigationbar on the right side without IB?
How can I add 2 buttons into the UINavigationBar without XIB?
The 2 buttons should be aligned on the right side of the UINavigationBar .
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Java, List only subdirectories from a directory, not files
...te
Comment from the author on this post wanted a faster way, great discussion here:
How to retrieve a list of directories QUICKLY in Java?
Basically:
If you control the file structure, I would try to avoid getting into that situation.
In Java NIO.2, you can use the directories function to retur...
Are there any CSV readers/writer libraries in C#? [closed]
...his a go, and it was both fast and memory efficient. I think the documentation could be improved a bit for first-time users, but it was definitely sufficient.
– Sam
Dec 6 '16 at 22:08
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Creating a textarea with auto-resize
...e 10/11):
var observe;
if (window.attachEvent) {
observe = function (element, event, handler) {
element.attachEvent('on'+event, handler);
};
}
else {
observe = function (element, event, handler) {
element.addEventListener(event, handler, false);
};
}
f...
How to build Qt for Visual Studio 2010
I struggled finding a how-to which provides a stable solution for using Qt with Visual Studio 2010, so after collecting all the bits of information and some trial and error, I would like to write my solution into a guide.
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Creating temporary files in Android
...he Activity pointer
File outputFile = File.createTempFile("prefix", "extension", outputDir);
As for their deletion, I am not complete sure either. Since I use this in my implementation of a cache, I manually delete the oldest files till the cache directory size comes down to my preset value.
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A valid provisioning profile for this executable was not found for debug mode
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It could be because your iphone is not recognized by the provisioning portal.
Solution:
1) In Xcode, Goto --> Build --> clean all targets.
2) In "Groups & Files" -->Target --> expand it --> right click your app and select Clean "your app"
3) Goto->Window-->Or...