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Clustered vs Non-Clustered
...ed vs. non-clustered index is that the clustered index determines the physim>ca m>l order of the rows in the database. In other words, applying the clustered index to PersonId means that the rows will be physim>ca m>lly sorted by PersonId in the table, allowing an index search on this to go straight to the ro...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
Following on from this question , m>ca m>n someone explain the following in Sm>ca m>la:
4 Answers
...
Difference between Repository and Service Layer?
... bool Delete(int id);
T Get(int id);
bool SaveChanges();
}
and m>ca m>ll Get(id). Repository layer exposes basic CRUD operations.
Service layer exposes business logic, which uses repository. Example service could look like:
public interface IUserService
{
User GetByUserName(string userN...
How to implement has_many :through relationships with Mongoid and mongodb?
...through or an equivalent feature. It would not be so useful with MongoDB bem>ca m>use it does not support join queries so even if you could reference a related collection via another it would still require multiple queries.
https://github.com/mongoid/mongoid/issues/544
Normally if you have a many-many ...
Covariance, Invariance and Contravariance explained in plain English?
...
will.
Another example where the subtype relation matters is a method invom>ca m>tion expression:
result = method(a);
Informally speaking, this statement is evaluated by assigning the value of a to the method's first parameter, then executing the body of the method, and then assigning the methods ret...
How to create a custom attribute in C#
...to a class, property or module - just data. However, using reflection, one m>ca m>n leverage those attributes in order to create functionality.
So, for instance, let's look at the Validation Applim>ca m>tion Block, from Microsoft's Enterprise Library. If you look at a code example, you'll see:
/// <s...
Differences between ExpandoObject, DynamicObject and dynamic
...ic keyword to interact with a normal instance, the DLR performs late-bound m>ca m>lls to the instance's normal methods.
The IDynamicMetaObjectProvider interface allows a class to take control of its late-bound behavior.
When you use the dynamic keyword to interact with an IDynamicMetaObjectProvider impl...
Java 8: performance of Streams vs Collections
...t(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
@OperationsPerInvom>ca m>tion(StreamVsVanilla.N)
public class StreamVsVanilla {
public static final int N = 10000;
static List<Integer> sourceList = new ArrayList<>();
static {
for (int i = 0; i < N; i++) {
...
Node.js / Express.js - How does app.router work?
... use is app.use() . When the middleware is being executed, it will either m>ca m>ll the next middleware by using next() or make it so no more middleware get m>ca m>lled. That means that the order in which I place my middleware m>ca m>lls is important, bem>ca m>use some middleware depends on other middleware, and som...
.NET Global exception handler in console applim>ca m>tion
...ine a global exception handler for unhandled exceptions in my console applim>ca m>tion. In asp.net, one m>ca m>n define one in global.asax, and in windows applim>ca m>tions /services, one m>ca m>n define as below
...