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What's a correct and good way to implement __hash__()?
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Aside from the minor overhead from factoring out the __key function, this is about as fast as any hash can be. Sure, if the attributes are known to be integers, and there aren't too many of them, I suppose you could potentially...
What are the big differences between TFVC (TFS Version Control) and Git for source control when usin
... any new developer in my team in minutes. I also see encouraging working locally as a big disadvantage inside a team and even individually. How do you prevent losing your work in Git without littering the project with branches ? (For this there are shelvesets in TFS - ON THE SERVER)
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What tools are there for functional programming in C?
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FFCALL lets you build closures in C -- callback = alloc_callback(&function, data) returns a function pointer such that callback(arg1, ...) is equivalent to calling function(data, arg1, ...). You will have to handle garbage...
Does Spring @Transactional attribute work on a private method?
...ded by Spring (like @Transactional) will only be taken into account if the call goes through the proxy. -- This is normally the case if the annotated method is invoked from another bean.
This has two implications:
Because private methods must not be invoked from another bean (the exception is refle...
What is boxing and unboxing and what are the trade offs?
...s that are minimal wrappers around primitive types*. Boxed values are typically stored as pointers to objects on the heap.
Thus, boxed values use more memory and take at minimum two memory lookups to access: once to get the pointer, and another to follow that pointer to the primitive. Obviously t...
How do I save a String to a text file using Java?
In Java, I have text from a text field in a String variable called "text".
24 Answers
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How do you add a timer to a C# console application
... public static void Main() {
// Create a Timer object that knows to call our TimerCallback
// method once every 2000 milliseconds.
Timer t = new Timer(TimerCallback, null, 0, 2000);
// Wait for the user to hit <Enter>
Console.ReadLine();
}
private static v...
How to get the second column from command output?
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this helped me trying to do following (fetch commit id of a file in git): git annotate myfile.cpp | grep '2016-07' | head -1| cut -f1
– serup
Jul 14 '16 at 7:34
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How do I get the SharedPreferences from a PreferenceActivity in Android?
...g
this, Android provides a simple set of APIs.
Preferences are typically name value pairs. They can be stored as
“Shared Preferences” across various activities in an application (note
currently it cannot be shared across processes). Or it can be
something that needs to be stored sp...
Ship an application with a database
...e a sqlite database.
*/
public class Database extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
DatabaseHelper myDb...