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What exactly is a Context in Java? [duplicate]
I Googled this and read the Java documentation, but I'm a bit confused. Can somebody please explain what a Context is in plain English?
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System.currentTimeMillis() vs. new Date() vs. Calendar.getInstance().getTime()
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System.currentTimeMillis() is obviously the most efficient since it does not even create an object, but new Date() is really just a thin wrapper about a long, so it is not far behind. Calendar, on the other hand, is relatively slow and very complex, since it has to deal with the considerab...
Transposing a 2D-array in JavaScript
...lback is invoked only for indexes of the array which have assigned values; it is not invoked for indexes which have been deleted or which have never been assigned values.
callback is invoked with three arguments: the value of the element, the index of the element, and the Array object being tra...
How do I remove a submodule?
How do I remove a Git submodule?
30 Answers
30
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Is asynchronous jdbc call possible?
...ely the basic problem is that the JDBC operations block on socket IO. When it does this it blocks the Thread its running on - end of story. Whatever wrapping framework you choose to use its going to end up with one thread being kept busy/blocked per concurrent request.
If the underlying database dr...
How to run Unix shell script from Java code?
It is quite simple to run a Unix command from Java.
17 Answers
17
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pycharm running way slow
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Every performance problem with PyCharm is unique, a solution that helps to one person will not work for another. The only proper way to fix your specific performance problem is by capturing the CPU profiler snapshot as described in this document and se...
System.IO.Packaging
...ve my project set to .NET Framework 4.0. When I add System.IO.Packaging , it says that it doesn't exist. It also doesn't show up when I try to add it as a reference to the project.
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What is `mt=8` in iTunes links for the App Store?
... Movies
7 iPod Games
8 Mobile Software Applications
9 Ringtones
10 iTunes U
11 E-Books
12 Desktop Apps
So, to answer your question, the "mt=8" in iTunes links simply identifies it as being of type 'Mobile Software Applications'.
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How to determine the current shell I'm working on
...ee approaches can be fooled if the executable of the shell is /bin/sh, but it's really a renamed bash, for example (which frequently happens).
Thus your second question of whether ps output will do is answered with "not always".
echo $0 - will print the program name... which in the case of the sh...