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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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Where are my postgres *.conf files?
...based authentication file
# (change requires restart)
#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file
# (change requires restart)
# If external_pid_file is not explicitly set, no extra PID file is written.
#external_pid_file = '(none)' ...
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 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...
How will I know when to create an interface?
...t implements IEnumerable. Because anything that implements IEnumerable basically says "I support iteration in a unordered foreach-type pattern", you can define complex behaviors (Count, Max, Where, Select, etc.) for any enumerable type.
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How can I rollback a github repository to a specific commit?
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git reset --hard <old-commit-id>
git push -f <remote-name> <branch-name>
Note: As written in comments below, Using this is dangerous in a collaborative environment: you're rewriting history
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What is the meaning of “non temporal” memory accesses in x86
...e and a mask indicates what parts of the line are up-to-date. This webpage calls it "no stall on store": ptlsim.org/Documentation/html/node30.html . I couldn't find more precise references, I only heard about this from guys whose job is to implement processor simulators.
– Pasc...