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What version of javac built my jar?
...sion of the Java compiler was used to build a jar? I have a jar file, and it could have been built in any one of three JDKs. We need to know exactly which one, so we can certify compatibility. Is the compiler version embedded somewhere in the class files or jar?
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Fastest sort of fixed length 6 int array
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For any optimization, it's always best to test, test, test. I would try at least sorting networks and insertion sort. If I were betting, I'd put my money on insertion sort based on past experience.
Do you know anything about the input data? So...
How to quietly remove a directory with content in PowerShell
Using PowerShell, is it possible to remove some directory that contains files without prompting to confirm action?
13 Answe...
Where does gcc look for C and C++ header files?
...print-prog-name=cc1plus` -v
This command asks gcc which C++ preprocessor it is using, and then asks that preprocessor where it looks for includes.
You will get a reliable answer for your specific setup.
Likewise, for the C preprocessor:
`gcc -print-prog-name=cpp` -v
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Authenticate with GitHub using a token
I am trying to authenticate with GitHub using a personal access token. In the help files at github, it states to use the cURL method to authenticate ( https://help.github.com/articles/creating-an-access-token-for-command-line-use ). I have tried this, but I still cannot push to GitHub. Please note, ...
How to set enum to null
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You can either use the "?" operator for a nullable type.
public Color? myColor = null;
Or use the standard practice for enums that cannot be null by having the FIRST value in the enum (aka 0) be the default value. For example in a ...
Find a commit on GitHub given the commit hash
I am fairly new to Github and have come across an amateur-ish problem.
3 Answers
3
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Android Studio marks R in red with error message “cannot resolve symbol R”, but build succeeds
...I've tried to create in Android Studio, all usages of R are marked in red with the error message "cannot resolve symbol R", but the compilation succeeds and the application runs. This is really annoying, as it blocks auto-completion and shows huge red waved lines all over my code.
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Django Server Error: port is already in use
...ype sudo fuser -k 8000/tcp.
This should kill all the processes associated with port 8000.
EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
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How do I programmatically change file permissions?
...r file attributes is available in Java 7, as part of the "new" New IO facility (NIO.2). For example, POSIX permissions can be set on an existing file with setPosixFilePermissions(), or atomically at file creation with methods like createFile() or newByteChannel().
You can create a set of permission...