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How can I remove a button or make it invisible in Android?
How can I remove a button in Android, or make it invisible?
14 Answers
14
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Is iterating ConcurrentHashMap values thread safe?
In javadoc for ConcurrentHashMap is the following:
5 Answers
5
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Why do access tokens expire?
I am just getting started working with Google API and OAuth2. When the client authorizes my app I am given a "refresh token" and a short lived "access token". Now every time the access token expires, I can POST my refresh token to Google and they will give me a new access token.
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Git reset --hard and push to remote repository
I had a repository that had some bad commits on it (D, E and F for this example).
5 Answers
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Exclude folder from search but not from the project list
...t; Scopes to use it for Find in Path or Replace in Path.
I suggest to reorganize your folders, so that no unnecessary files are left in project directory. Also, you can specify Source Root by going to Settings > Project Settings > Directories and adding additional directories.
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Algorithm to compare two images
...r. “Covariance Tracking Using Model Update Based
on Means on Riemannian Manifolds”. (2006) IEEE Computer Vision and Pattern Recognition.
I was successfully able to detect overlapping regions in images captured from adjacent webcams using the technique presented in this paper. My covariance mat...
RAII and smart pointers in C++
...example ends horribly - file will be closed as soon as this method ends, meaning that foo and bar now have an invalid log file. We could construct file on the heap, and pass a pointer to file to both foo and bar:
void setLog(const Foo & foo, const Bar & bar) {
File* file = new File("/pa...
How to merge remote master to local branch
I have a local branch of a project ("configUpdate") that I've forked from somebody else's project and I've done a load of changes on it and would like to merge the changes they've made in to my local branch.
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python: How do I know what type of exception occurred?
...ed. Otherwise, the values
returned are (type, value, traceback). Their meaning is: type gets the
type of the exception being handled (a subclass of BaseException);
value gets the exception instance (an instance of the exception type);
traceback gets a traceback object (see the Reference Manu...
App Inventor 2 扩展 · App Inventor 2 中文网
... figure below.
After importing an extension, make sure to restart the companion app, else an error may occur.
Figure 3: An imported extension shown in components palette
2.2 Some sample extensions to try
Here are some sample extension components to experiment with. You can find these in the ...