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When do you use map vs flatMap in RxJava?
... in RxJava?. And I think a simple demo is more specific.
When you want to convert item emitted to another type , in your case converting file to String, map and flatMap can both work. But I prefer map operator because it's more clearly.
However in some place, flatMap can do magic work but map can'...
Optional query string parameters in ASP.NET Web API
.../ ...
}
public class Paging
{
public string Sort { get; set; }
public int Skip { get; set; }
public int Take { get; set; }
}
Update:
In order to ensure the values are optional make sure to use reference types or nullables (ex. int?) for the models properties.
...
Benefits of inline functions in C++?
...
I could see a situation like this making a detectable difference:
inline int aplusb_pow2(int a, int b) {
return (a + b)*(a + b) ;
}
for(int a = 0; a < 900000; ++a)
for(int b = 0; b < 900000; ++b)
aplusb_pow2(a, b);
...
Why does changing the sum order returns a different result?
...ory, floating points use a special format along the lines of IEEE 754 (the converter provides much better explanation than I can).
Anyways, here's the float converter.
http://www.h-schmidt.net/FloatConverter/
The thing about the order of operations is the "fineness" of the operation.
Your first ...
Smooth GPS data
...n be ignored, because if you put scaling factors into the Kalman filter to convert them all into the same units, then those scaling factors end up cancelling out when converting the results back into the original units.
The code could be improved, because it assumes that the best estimate of curren...
Java SafeVarargs annotation, does a standard or best practice exist?
...a simple "re-writing" at compile-time: a varargs parameter of type X... is converted into a parameter of type X[]; and every time a call is made to this varargs method, the compiler collects all of the "variable arguments" that goes in the varargs parameter, and creates an array just like new X[] { ...
When is a C++ destructor called?
...
1) If the object is created via a pointer and that pointer is later deleted or given a new address to point to, does the object that it was pointing to call its destructor (assuming nothing else is pointing to it)?
It depends on the type of pointers. For exam...
Will the base class constructor be automatically called?
... need additional parameters. For example:
public class Base
{
public int SomeNumber { get; set; }
public Base(int someNumber)
{
SomeNumber = someNumber;
}
}
public class AlwaysThreeDerived : Base
{
public AlwaysThreeDerived()
: base(3)
{
}
}
In or...
How to handle ListView click in Android
...@Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Toast.makeText(MainActivity.this, "You Clicked at " +countries[+ position], Toast.LENGTH_SHORT).show(); }
– bourax webmaster
Apr 5 '14 at 9:51
...
Is there a Java equivalent to C#'s 'yield' keyword?
...rtable (for example, I don't think Aviad's library will work on Android).
Interface
Aviad's library has a cleaner interface - here's an example:
Iterable<Integer> it = new Yielder<Integer>() {
@Override protected void yieldNextCore() {
for (int i = 0; i < 10; i++) {
...