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Type erasure techniques
... erasure techniques in C++ are done with function pointers (for behaviour) and void* (for data). The "different" methods simply differ in the way they add semantic sugar. Virtual functions, e.g., are just semantic sugar for
struct Class {
struct vtable {
void (*dtor)(Class*);
vo...
What is the difference between ArrayList.clear() and ArrayList.removeAll()?
...h faster since it doesn't have to deal with all those extra method calls.
And as Atrey points out, c.contains(..) increases the time complexity of removeAll to O(n2) as opposed to clear's O(n).
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Replacing NAs with latest non-NA value
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@BallpointBen 's comment is important and should be included in the answer. Thanks!
– Ben
Mar 6 at 16:43
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What does “@private” mean in Objective-C?
... // We can access protectedLetter because it's protected
// and it is declared by a superclass; @protected variables
// are available to subclasses.
protectedLetter = 'z';
// We can't access privateBool because it's private;
// only methods of the clas...
Same Navigation Drawer in different Activities
...orking navigation drawer like it's shown in the tutorial on the developer.android.com website. But now, I want to use one Navigation Drawer, i created in the NavigationDrawer.class for multiple Activities in my Application.
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Best practice for instantiating a new Android Fragment
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If Android decides to recreate your Fragment later, it's going to call the no-argument constructor of your fragment. So overloading the constructor is not a solution.
With that being said, the way to pass stuff to your Fragment...
Why is super.super.method(); not allowed in Java?
I read this question and thought that would easily be solved (not that it isn't solvable without) if one could write:
22...
Android: AutoCompleteTextView show suggestions when no text entered
...ou can arrange to show it when you want. Or, subclass AutoCompleteTextView and override enoughToFilter(), returning true all of time.
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Evenly distributing n points on a sphere
...han Euclidean distances. But maybe I can answer a simple question, if one converts the points on the sphere to their Voronoi diagram, one can describe each Voronoi cell as having approximately area 4π/N and one can convert this to a characteristic distance by pretending it's a circle rather than a...
Can I use Objective-C blocks as properties?
Is it possible to have blocks as properties using the standard property syntax?
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