I often forget the nomenclature of a few C# coding constructs. Maybe writing them down will help.
In C# 2.0, generics were introduced. For a generic there is a <T> which stands for Generic Type Parameter. The generic type is a blueprint for what you actually want to implement. An example is the code below where I want to implement an IoC container to write session details to Redis.
/// <summary>
/// funq IoC container for in memory cache client like Redis
/// used for Auth
/// </summary>
/// <param name="container"></param>
public override void Configure(Container container)
{
Plugins.Add(new AuthFeature(
() => new AuthUserSession(),
new IAuthProvider[] {new BasicAuthProvider(), }));
container.Register<ICacheClient>(new MemoryCacheClient());
var userRepository = new InMemoryAuthRepository();
container.Register<IUserAuthRepository>(userRepository);
}
}
The other thing I forget is what () => means in for lambdas. To create a lambda expression, you optionally specify input parameters on the left side of the lambda operator =>, and you put the expression or statement block on the other side. I always forget that () is just an empty parameter list. I am not even sure why I used an empty list in the delegate above. Why!?
For example, the lambda expression x => x * x specifies a parameter that’s named x and returns the value of x squared.
REFS:
https://msdn.microsoft.com/en-us/library/0zk36dx2.aspx
https://msdn.microsoft.com/en-us/library/bb397687.aspx
In C# 2.0, generics were introduced. For a generic there is a <T> which stands for Generic Type Parameter. The generic type is a blueprint for what you actually want to implement. An example is the code below where I want to implement an IoC container to write session details to Redis.
/// <summary>
/// funq IoC container for in memory cache client like Redis
/// used for Auth
/// </summary>
/// <param name="container"></param>
public override void Configure(Container container)
{
Plugins.Add(new AuthFeature(
() => new AuthUserSession(),
new IAuthProvider[] {new BasicAuthProvider(), }));
container.Register<ICacheClient>(new MemoryCacheClient());
var userRepository = new InMemoryAuthRepository();
container.Register<IUserAuthRepository>(userRepository);
}
}
The other thing I forget is what () => means in for lambdas. To create a lambda expression, you optionally specify input parameters on the left side of the lambda operator =>, and you put the expression or statement block on the other side. I always forget that () is just an empty parameter list. I am not even sure why I used an empty list in the delegate above. Why!?
For example, the lambda expression x => x * x specifies a parameter that’s named x and returns the value of x squared.
REFS:
https://msdn.microsoft.com/en-us/library/0zk36dx2.aspx
https://msdn.microsoft.com/en-us/library/bb397687.aspx
