公司使用C＃中的Func和Action代理吗？

Question

I really wonder if the Func and Action delegates are used by developing companies. And do they use it for events? I know it's a strange question but I already asked it to my teacher and many other people but nobody could give me an answer.

Answer 1

In C#, Action and Func are extremely useful tools for reducing duplication in code and decreasing coupling. And reduce duplication and make code reusable is important to any company

It is a shame that many developers shy away from them because they don't really understand them.

Adding Action and Func to your toolbox is a very important step in improving your C# code.

As great exmaple of Using them : Linq is based on Action and Func and Predicate

Answer 2

Here's an example of the power of these constructs, which illustrates for me the emptiness of the "junior devs might not understand it" argument.

If you have an Organisation class, which contains a collection of Department objects, and if the Department class contains a collection of Employee objects, how do you get the full set of employees for an organisation?

You could loop through the objects and build up a collection:

var allEmployees = new List<Employee>();
foreach (var department in organisation.Departments)
{
    foreach (var employee in department.Employees)
    {
        allEmployees.Add(employee);
    }
}

or you could simply use the single statement

var allEmployees = organisation.Departments.SelectMany(d => d.Employees).ToArray();

This code is terser, and less susceptible to human error, than the manual loop, and the immutability of the resultant array is less prone to bugs than the mutable list. To obtain these benefits, it is necessary to be comfortable with the use of lambdas to represent Func and Action constructs.