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How is an overloaded method chosen when a parameter is the literal null value?
...("Hello methodC");
}
}
public class MyTest {
public static void fun(B Obj){
System.out.println("B Class.");
}
public static void fun(A Obj){
System.out.println("A Class.");
}
public static void main(String[] args) {
fun(null);
}
}
output...
std::function vs template
Thanks to C++11 we received the std::function family of functor wrappers. Unfortunately, I keep hearing only bad things about these new additions. The most popular is that they are horribly slow. I tested it and they truly suck in comparison with templates.
...
boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...lly taken care of: boost::hash is specialized to hash a composite key as a function of the boost::hash values of its elements. Should we need to specify different hash functions for the elements of a composite key, we can explicitly do so by using the composite_key_hash utility:
struct tuned_i...
How to disable copy/paste from/to EditText
...
I am able to disable copy-and-paste functionality with the following:
textField.setCustomSelectionActionModeCallback(new ActionMode.Callback() {
public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
return false;
}
public ...
What are all the uses of an underscore in Scala?
...s
List(1, 2, 3) foreach println _
Converting call-by-name parameters to functions
def toFunction(callByName: => Int): () => Int = callByName _
Default initializer
var x: String = _ // unloved syntax may be eliminated
There may be others I have forgotten!
Example showing why foo(_...
Permutations in JavaScript?
I'm trying to write a function that does the following:
35 Answers
35
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Determine when a ViewPager changes pages
...geListener(object : ViewPager.OnPageChangeListener {
override fun onPageScrollStateChanged(state: Int) {
}
override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
}
override fun onPageSelected(posi...
Type definition in object literal in TypeScript
... as Alternative)
After many years of using const and benefiting from more functional code, I would recommend against using the below in most cases. (When building objects, forcing the type system into a specific type instead of letting it infer types is often an indication that something is wrong)....
check android application is in foreground or not? [duplicate]
...
class ArchLifecycleApp : Application(), LifecycleObserver {
override fun onCreate() {
super.onCreate()
ProcessLifecycleOwner.get().lifecycle.addObserver(this)
}
@OnLifecycleEvent(Lifecycle.Event.ON_STOP)
fun onAppBackgrounded() {
Log.d("MyApp", "App in back...
Multiprocessing: How to use Pool.map on a function defined in a class?
...
I also was annoyed by restrictions on what sort of functions pool.map could accept. I wrote the following to circumvent this. It appears to work, even for recursive use of parmap.
from multiprocessing import Process, Pipe
from itertools import izip
def spawn(f):
def fun(...