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“java.lang.OutOfMemoryError : unable to create new native Thread”
... thread problem. There's also an option called TasksMax (for more isolated settings) for services/systemd that are under [Service] TasksMax=(value). At SUSE, the default value is 512 (which is very limited for production use). More info suse.com/support/kb/doc/?id=000015901 systemctl daemon-reload,...
Why do we need a pure virtual destructor in C++?
I understand the need for a virtual destructor. But why do we need a pure virtual destructor? In one of the C++ articles, the author has mentioned that we use pure virtual destructor when we want to make a class abstract.
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Python - How to sort a list of lists by the fourth element in each list? [duplicate]
... sort the following list of lists by the fourth element (the integer) in each individual list.
2 Answers
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In laymans terms, what does 'static' mean in Java? [duplicate]
...7;
SomeObjectWithStaticStuff.someField = 10; //Redefines the above set
}
}
The second issue is that static methods and inner classes cannot access fields in the enclosing object (since there isn't one).
public class SomeObjectWithStaticStuff {
private int nonStaticField;
priva...
Declaring pointers; asterisk on the left or right of the space between the type and name? [duplicate
I've seen mixed versions of this in a lot of code. (This applies to C and C++, by the way.) People seem to declare pointers in one of two ways, and I have no idea which one is correct, of if it even matters.
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How to go back (ctrl+z) in vi/vim
In normal text editors [with all due respect to Vim] there is a shortcut Ctrl + Z when you have done something nasty and want to return to the previous version of the text. Like BACK button in Word. I wonder how can you achieve this behaviour in Vim.
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Equation for testing if a point is inside a circle
If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle?
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How do I shutdown, restart, or log off Windows via a bat file?
.... Prevents the shutdown process from getting stuck.
-t <seconds> — Sets the time until shutdown. Use -t 0 to shutdown immediately.
-c <message> — Adds a shutdown message. The message will end up in the Event Log.
-y — Forces a "yes" answer to all shutdown queries.
Note: This optio...
Converting from longitude\latitude to Cartesian coordinates
...unction pj_geodetic_to_geocentric will do the conversion without having to set up a projection object first.
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How do I define a method which takes a lambda as a parameter in Java 8?
...t accepts and returns exactly what you want.
For this Java 8 comes with a set of commonly-used interface types in java.util.function (thanks to Maurice Naftalin for the hint about the JavaDoc).
For this specific use case there's java.util.function.IntBinaryOperator with a single int applyAsInt(int...