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When should one use RxJava Observable and when simple Callback on Android?
...});
The RxJava variant is not much better than the Callback variant. For now, let's ignore the error handling.
Let's take a list of photos:
RxJava:
api.getUserPhotos(userId)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.flatMap(new Func1<List<Photo>, Observab...
How to build Qt for Visual Studio 2010
...7: the latest Qt 4.x branch (Qt 4.8.6) has 2 pre-built packages, which are now in the archive section:
http://download.qt.io/archive/qt/4.8/4.8.6/qt-opensource-windows-x86-vs2010-4.8.6.exe
http://download.qt.io/archive/qt/4.8/4.8.6/qt-opensource-windows-x86-vs2008-4.8.6.exe
You should not downlo...
How to unit test an object with database queries
...r
{
public Foo[] GetAllFoos() {
return Foo.GetAll();
}
}
Now in your unit test, you create a mock of FooDataProvider, which allows you to call the method GetAllFoos without having to actually hit the database.
class BarTests
{
public TestGetAllFoos() {
// here we set u...
How to stop /#/ in browser with react-router?
...outer>. From the histories documentation:
In a nutshell, a history knows how to listen to the browser's address bar for changes and parses the URL into a location object that the router can use to match routes and render the correct set of components.
Versions 2 and 3
In react-router 2 and...
How do I define global variables in CoffeeScript?
...#L321 ), so in Node.js what you would need to do is exports.foo = 'baz';.
Now let us take a look at what it states in your quote from the docs:
...targeting both CommonJS and the browser: root = exports ? this
This is obviously coffee-script, so let's take a look into what this actually com...
Timer function to provide time in nano seconds using C++
...e QueryPerformanceCounter. And here is more on QPC
Apparently there is a known issue with QPC on some chipsets, so you may want to make sure you do not have those chipset. Additionally some dual core AMDs may also cause a problem. See the second post by sebbbi, where he states:
QueryPerformance...
JavaScript: How to pass object by value?
...var key in obj)
temp[key] = clone(obj[key]);
return temp;
}
Now you can you use like this:
(function(x){
var obj = clone(x);
obj.foo = 'foo';
obj.bar = 'bar';
})(o)
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...
Can a class member function template be virtual?
... just indirection, and there is no "runtime figuring out" involved, it is known during compile time that the function to be called is the one pointed to by the n-th pointer in the vtable. "Figuring out" implies there are type checks and such, which is not the case. Once the run-time system figured o...
Pointer to pointer clarification
...lue of ipp. So, ipp still points to ip1 (the value of ipp), ip1's value is now the same as ip2's value, so they both point to j.
This:
*ipp = ip2;
is the same as:
ip1 = ip2;
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improve th...
REST Complex/Composite/Nested Resources [closed]
...book and return the server generated id (lets say it comes back as 8), and now you can add covers to it like so:
POST http://example.com/comic-books/8/covers
with the cover in the entity body.
Now you have a good question which is what happens if your business rule says there always must be at l...