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This article mainly shows you "what is the difference between Lambda expressions and anonymous methods", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what are the differences between Lambda expressions and anonymous methods" this article.

In fact, Lambda expressions are not much different from anonymous methods, they are the same thing at all. The only difference is that they have different grammatical expressions. Lambda expressions are a further evolution in syntax, that's all. So if we want to understand Lambda expressions, we should also understand anonymous methods.

Let's first look at a simple code example that uses anonymous methods and Lambda expressions to search for arrays:

Search for an array of strings containing an in an array of strings using the anonymous method of .net 2.0

Static void Main (string [] args)

{

String [] list = new string [] {"abc", "12", "java"}

String [] ll = Array.FindAll (list

Delegate (string s)

{

Return s.IndexOf ("a") > = 0

}

);

Foreach (string var in ll)

{

Console.WriteLine (var)

}

Console.ReadLine ()

}

Use the Lambda expression of .net 3.5 to search for an array of strings that contain a

Static void Main (string [] args)

{

String [] list = new string [] {"abc", "12", "java"}

String [] ll = Array.FindAll (list, s = > (s.IndexOf ("a") > = 0))

Foreach (string var in ll)

{

Console.WriteLine (var)

}

Console.ReadLine ()

}

We can see from the above two examples:

From a code writing perspective, code readability perspective: Lambda expressions are simpler than anonymous methods.

Lambda expressions and anonymous methods both do the same thing, so let's write one less function definition. The call to the function and the implementation of the function are completed together.

The Lambda expression is written in the following format:

(parameter list) = > expression or statement block

Where:

Number of parameters: can have multiple parameters, one parameter, or no parameters.

Parameter types: can be defined implicitly or explicitly.

Expression or statement block: this part is the implementation part of the function that we usually write (function body).

Some writing examples of Lambda expressions:

An example of an Lambda expression with two parameters:

Note: despite the complexity, LINQ actually does the delegate and DoSomeThing in the following code for you, so when you write the code, you only need to write

Vart = DoSomeThing (7, 8, (x, y) = > x * y); such a line.

Public delegate T HongJunGuoTest01 (T T1, T T2)

Class Program

{

Private static T DoSomeThing (T t 1, T t 2, T 2, match)

{

Return match (T1, T2)

}

Static void Main (string [] args)

{

Var t = DoSomeThing (7,8, (x, y) = > x * y)

Console.WriteLine (t)

Console.ReadLine ()

}

}

The following words are also correct (you only need to modify the code in the Main function, and you don't need to do anything else):

Var t = DoSomeThing (7,8, (int x, int y) = > x * y)

Var t = DoSomeThing ("7", "8", (x, y) = > x + y)

Or let's write a more complex one: = > there is a block of statements on the right.

Var t = DoSomeThing (7,8, (x, y) = > {if (x)

< 5) { return (x + 8) * y; } else { return y; } }); 最前面的例子是一个参数的例子，我们就不举一个参数的例子了，下面举一个没有参数的例子： public delegate void HongJunGuoTest02(); class Program { private static void DoSomeThing(HongJunGuoTest02 match) { match(); } static void Main(string[] args) { DoSomeThing(() =>

Console.WriteLine ("jajaja"))

Console.ReadLine ()

}

}

That's all of the article "what's the difference between Lambda expressions and anonymous methods?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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