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How to do the equivalent of pass by reference for primitives in Java
...s. The one that makes the most sense really depends on what you're trying to do.
Choice 1: make toyNumber a public member variable in a class
class MyToy {
public int toyNumber;
}
then pass a reference to a MyToy to your method.
void play(MyToy toy){
System.out.println("Toy number in p...
How do I verify/check/test/validate my SSH passphrase?
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You can verify your SSH key passphrase by attempting to load it into your SSH agent. With OpenSSH this is done via ssh-add.
Once you're done, remember to unload your SSH passphrase from the terminal by running ssh-add -d.
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
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XSD: What is the difference between xs:integer and xs:int?
I have started to create XSD and found in couple of examples for xs:integer and xs:int .
3 Answers
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pandas: How do I split text in a column into multiple rows?
I'm working with a large csv file and the next to last column has a string of text that I want to split by a specific delimiter. I was wondering if there is a simple way to do this using pandas or python?
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What is an example of the Liskov Substitution Principle?
...e. Indeed it is a specialization of a rectangle. The "is a" makes you want to model this with inheritance. However if in code you made Square derive from Rectangle, then a Square should be usable anywhere you expect a Rectangle. This makes for some strange behavior.
Imagine you had SetWidth and Se...
Detecting taps on attributed text in a UITextView in iOS
...displays an NSAttributedString . This string contains words that I'd like to make tappable, such that when they are tapped I get called back so that I can perform an action. I realise that UITextView can detect taps on a URL and call back my delegate, but these aren't URLs.
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How to directly initialize a HashMap (in a literal way)?
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All Versions
In case you happen to need just a single entry: There is Collections.singletonMap("key", "value").
For Java Version 9 or higher:
Yes, this is possible now. In Java 9 a couple of factory methods have been added that simplify the creation of ma...
Daemon Threads Explanation
...ver. These are only useful when the main program is running, and it's okay to kill them off once the other, non-daemon, threads have exited.
Without daemon threads, you'd have to keep track of them, and tell them to exit, before your program can completely quit. By setting them as daemon threads, y...
How to completely uninstall Android Studio on Mac?
...time I open it. It gives me plugin errors and several other errors. I need to uninstall it completely from my mac. I tried to delete it from my mac and then install it again as if you would do the first time, but it did nothing and now the same problems occur.
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