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What exactly does a jar file contain?
...company code in my projects and they usually send me a jar file to work with. I add it to the build path in Eclipse and usually all is fine and dandy.
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How to install an apk on the emulator in Android Studio?
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EDIT: Even though this answer is marked as the correct answer (in 2013), currently, as answered by @user2511630 below, you can drag-n-drop apk files directly into the emulator to install them.
Original Answer:
You can insta...
How can a Java program get its own process ID?
...() looks like the best (closest) solution, and typically includes the PID. It's short, and probably works in every implementation in wide use.
On linux+windows it returns a value like 12345@hostname (12345 being the process id). Beware though that according to the docs, there are no guarantees about...
Using link_to with embedded HTML
I'm using Twitter's Bootstrap stuff and I have the following HTML:
12 Answers
12
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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...follow
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edited Aug 2 '17 at 10:42
a_horse_with_no_name
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How to write into a file in PHP?
...contents($filename, $content);
which is identical to calling fopen(), fwrite(), and fclose() successively to write data to a file.
Docs: file_put_contents
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How to check if a file exists in the Documents directory in Swift?
...Directory, .userDomainMask, true)[0] as String
let url = NSURL(fileURLWithPath: path)
if let pathComponent = url.appendingPathComponent("nameOfFileHere") {
let filePath = pathComponent.path
let fileManager = FileManager.default
if fileManager.fileExists(atPath: filePa...
Why do you create a View in a database?
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A view provides several benefits.
1. Views can hide complexity
If you have a query that requires joining several tables, or has complex logic or calculations, you can code all that logic into a view, then select from the view just like you would a tabl...
What does 'synchronized' mean?
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The synchronized keyword is all about different threads reading and writing to the same variables, objects and resources. This is not a trivial topic in Java, but here is a quote from Sun:
synchronized methods enable a simple
strategy for preventing thread
interference and memory consi...
How to determine programmatically whether a particular process is 32-bit or 64-bit
...ular application/process (note: not the current process) is running in 32-bit or 64-bit mode?
7 Answers
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