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Count(*) vs Count(1) - SQL Server
...vers (such as auto-stats, xevent sessions, query store overhead, triggers, etc.). It is maybe a few thousand extra CPU instructions. So, count(1) does a tiny bit less work during compilation (which will usually happen once and the plan is cached across multiple subsequent executions). For executi...
What does “atomic” mean in programming?
...aking the operation atomic consists in using synchronization mechanisms in order to make sure that the operation is seen, from any other thread, as a single, atomic (i.e. not splittable in parts), operation. That means that any other thread, once the operation is made atomic, will either see the val...
Could not find default endpoint element
...s are read from the main project in a solution, be that web, winforms, wpf etc. Say for example you have a class library project to access a database, the connectionString entry will need to be in the main project config rather than the class library config.
– Ciaran Bruen
...
Is MonoTouch now banned on the iPhone? [closed]
...product in development was to be iPhone/iPad only (who cares about Android etc) and in MonoTouch. We have now reconsidered, and we will now be Obj-C as required, but we will also be sure to have Android and WinPhone support available day 1 too. A business cannot afford the uncertainty of behaviour,...
Break or return from Java 8 stream forEach?
...stream must not be null but suddenly and unexpectedly one of them is null) etc.
According to the documentation for Iterable.forEach():
Performs the given action for each element of the Iterable until all elements have been processed or the action throws an exception... Exceptions thrown by the ...
ASP.NET MVC 404 Error Handling [duplicate]
...t(new HttpContextWrapper(Context), rd);
var c = ControllerBuilder.Current.GetControllerFactory().CreateController(rc, "Errors");
c.Execute(rc);
Instead of
IController c = new ErrorsController();
c.Execute(new RequestContext(new HttpContextWrapper(Context), rd));
(Optional)
Explanation:
There ...
A simple explanation of Naive Bayes Classification
...o be trained for supervised learning tasks like classification, prediction etc. or for unsupervised learning tasks like clustering.
During the training step, the algorithms are taught with a particular input dataset (training set) so that later on we may test them for unknown inputs (which they hav...
Stash only one file out of multiple files that have changed with Git?
... you might want to add: git stash save -p my stash message; since the order of the argumenst is not very intuitive...
– Chris Maes
Apr 23 '15 at 9:12
16
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Is leaked memory freed up when the program exits?
... memory - as is the case with normal "flavors" of Windows, Linux, Solaris, etc. However it is important to note that in specialized environments such as various Real-Time Operating Systems the memory may not be freed when the program is terminated.
...
Trying to start a service on boot on Android
...r>
</receiver>
(you don't need the android:enabled, exported, etc., attributes: the Android defaults are correct)
In MyBroadcastReceiver.java:
package com.example;
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, In...