Design Patterns

Dart — implementing the Singleton pattern with factory constructors

In Dart there is an interesting language feature called ‘Factory Constructors’, which effectively allows you to override the default behaviour when using the new keyword — instead of always creating a new instance…

Shlomo Swidler’s Many Cloud Design Patterns slides

This is so good I keep going back to it, so to save myself and you the hassle of searching for it every time I thought I’d share it here on my blog, enjoy!

.Net Tips — Use Request and Response objects

We’ve all been there before, write a simple service with a simple method:

[code lang=”csharp”]
[ServiceContract]
public interface IService
{
 [OperationContract]
 int SimpleMethod(object param1);
}
[/code]

Pattern for dealing with null handler for events in C#

If you’ve used events in C# before, you’ve probably written code like this too:

[code lang=”csharp”]
public event EventHandler Started;
…
// make sure Started is not null before firing the event
// else…

Buzzword Buster — IoC

Definition:

Inversion of Control (IoC) refers to the inversion of the flow of control (the order in which individual statements, function calls, etc. are executed) in a software. You’ll often hear the term Hollywood principle being mentioned in the same…