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Why should I declare a virtual destructor for an abstract class in C++?
I know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
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MFC Grid control 2.27 - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
... Protected overridable functions
Clipboard
Sorting
Virtual Mode
Acknowledgements
General appearance and features
Files
Construction
Number of rows and columns
Sizing and position functions
Reordering rows and columns
Cell Editing and Validation
Structu...
Android: Expand/collapse animation
...o I post my actual solution. The main advantage is that you don't have to know the expanded height to apply the animation and once the view is expanded, it adapts height if content changes. It works great for me.
public static void expand(final View v) {
int matchParentMeasureSpec = View.Measur...
Current time in microseconds in java
...ave System.nanoTime(), but that just gives an offset from some previously known time. So whilst you can't take the absolute number from this, you can use it to measure nanosecond (or higher) precision.
Note that the JavaDoc says that whilst this provides nanosecond precision, that doesn't mean nano...
The best way to remove duplicate values from NSMutableArray in Objective-C?
...ded NSOrderedSet to iOS 5 and Mac OS X 10.7. What had been an algorithm is now two lines of code:
NSOrderedSet *orderedSet = [NSOrderedSet orderedSetWithArray:yourArray];
NSArray *arrayWithoutDuplicates = [orderedSet array];
If you are worried about the order and you're running on iOS 4 or earl...
Can I recover a branch after its deletion in Git?
...bove - git checkout -b <branch> <sha>
– Snowcrash
May 29 '14 at 14:37
6
yea just scro...
Why was “Avoid Enums Where You Only Need Ints” removed from Android's performance tips?
...d your credentials in your SO profile. It took me some digging around. But now that I see that you seem to work on the VM team, I'll accept your answer as the official answer. :)
– Thierry-Dimitri Roy
Mar 11 '11 at 18:03
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Sample random rows in dataframe
... sample_frac) have been superseded by slice_sample, though they remain for now.
– Matt_B
Sep 4 at 2:50
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Git push failed, “Non-fast forward updates were rejected”
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This command worked me, however I'd like to know, why this doesn't: git pull? The remote is equal to origin, so it actually runs: git pull origin. Shouldn't it update all the branches?
– Karlen Kishmiryan
Apr 15 '15 at 13:35
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How much does it cost to develop an iPhone application? [closed]
...wa) $50-150K estimate with the 22 day Obama app.
Take another hit, dude.
Now if you want to build backend services for your app, that number's going to go up even more. Everyone seems surprised that Instagram chewed through $500K in venture funding to build a new frontend and backend. I'm not.
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