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Is returning null bad design? [closed]
... I were to define a method in Java that returned a Collection I would typically prefer to return an empty collection (i.e. Collections.emptyList()) rather than null as it means my client code is cleaner; e.g.
Collection<? extends Item> c = getItems(); // Will never return null.
for (Item ite...
Difference between “on-heap” and “off-heap”
...y point to). This is important because a direct ByteBuffer (the ByteBuffer.allocateDirect kind, not the MMap kind) will be collected by the GC and when it gets collected it's Deallocater will get triggered, effectively collecting the unmanaged memory as well.
– Nitsan Wakart
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BackgroundWorker vs background Thread
...ome way (and is it better) to thread.Join the background worker until it really does exit and then let the Dispose of the form continue?
– freddy smith
Oct 1 '09 at 23:46
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How to connect to SQL Server database from JavaScript in the browser?
...de showing how to connect to a SQL Server 2005 database from JavaScript locally? I am learning web programming on my desktop.
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Multiple submit buttons in an HTML form
...tions, like a bigger page with several buttons spread over each corner but all in one single form this is simply unmanageable.
– Tylla
Jul 19 at 22:49
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Automatically start forever (node) on system restart
...terminates when there is a system restart. Is there any way I can automatically start the node server (with forever) when the system restarts?
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Concept behind these four lines of tricky C code
...
}
else
{
printf((char*) m);
}
}
It recursively calls main() 771 times.
In the beginning, m[0] = 7709179928849219.0, which stands for C++Suc;C. In every call, m[0] gets doubled, to "repair" last two letters. In the last call, m[0] contains ASCII char representation of C++...
Soft keyboard open and close listener in an activity in Android
...c class BaseActivity extends Activity {
private ViewTreeObserver.OnGlobalLayoutListener keyboardLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int heightDiff = rootLayout.getRootView().getHeight() - rootLayout...
Collections.emptyMap() vs new HashMap()
...need to explicitly type out the generic type of the collection - it's generally just inferred from the context of the method call.
They're more efficient because they don't bother creating new objects; they just re-use an existing empty and immutable object. This effect is generally very minor, b...
C# string reference type?
...iables pointing to the string. And because any operations with strings actually create a new object, we make our local copy to point to the new string. But the original test variable is not changed.
The suggested solutions to put ref in the function declaration and in the invocation work because we...