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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
...Models by resolving them from a dependency injection (DI) container. This happens automatically when the container is asked to provide (resolve) an instance of the View class. The container injects the ViewModel into the View by calling a constructor of the View which accepts a ViewModel parameter; ...
User Authentication in ASP.NET Web API
This topic has been incredibly confusing for me. I am a rookie in HTTP apps but need to develop an iPhone client that consumes JSON data from somewhere. I chose Web API from MS because it seemed easy enough but when it comes to authenticating users, things get quite frustrating.
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How to avoid isset() and empty()
I have several older applications that throw a lot of "xyz is undefined" and "undefined offset" messages when running on the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts.
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What is data oriented design?
...ed very well by Andrew Keith's answer).
Say you have ball objects in your application with properties such as color, radius, bounciness, position etc.
Object Oriented Approach
In OOP you would describe balls like this:
class Ball {
Point position;
Color color;
double radius;
void dra...
Constant Amortized Time
...oted 1 Million operations, you don't care indeed. But if it is a real time app, that is constantly reading data and then responding to it, you might have a big problem, if processing that data takes 1 Million times longer than normal once every 1 Million data items processed!
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What is the global interpreter lock (GIL) in CPython?
...cally it means that threads in Python are only good for blocking I/O; your app will never go above 1 CPU core of processor usage
– Ana Betts
Aug 18 '09 at 15:26
8
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What is the difference between YAML and JSON?
...aning" to indentation a poor choice.
If the data format will be leaving an application's environment, parsed within a UI, or sent in a messaging layer, JSON might be a better choice.
YAML can be used, directly, for complex tasks like grammar definitions, and is often a better choice than inventing a...
Using ThreadPool.QueueUserWorkItem in ASP.NET in a high traffic scenario
...pletely!
Most of the time I see or hear about multi-threaded code being inappropriately used in ASP.NET, it's not for queuing CPU-intensive work. It's for queuing I/O-bound work. And if you want to do I/O work, then you should be using an I/O thread (I/O Completion Port).
Specifically, you shoul...
Android accelerometer accuracy (Inertial navigation)
...Accelerometer
I have no idea how these methods would perform in real-life applications or how to turn them into a nice Android app.
A similar question is this.
UPDATE:
Apparently there is a newer version than the above Oliver J. Woodman, "An introduction to inertial navigation", his PhD thesis:
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How exactly does the “Specific Version” property of an assembly reference work in Visual Studio?
...out to learn as much as possible about how the property works. Even SO, it appears to me, does not have all the answers, so here is my attempt at self-answering the question:
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