Lamba expression syntax issue

Question

0.00/5 (No votes)

See more:

Hi, my problem is simple; from the [^]there is a lambda expression that bugs me:

C#

SendAction(() => All().CallOnEach<IListenTo<T>>(x => x.Handle(message)));

The first closed paranthesis comes with no prefix. Because of that i don't understand what this expression is supposed to mean. Any help is welcome.

Posted 2-Sep-13 22:23pm

YourAverageCoder

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

johannesnestler · Accepted Answer · 2013-09-02T23:35:00

Solution 1

this just means "void" so no "Input" variables for the first lambda (the second one defines one "x" - in this case it's allowed to leave the paranthesis away. So SendAction wants a function pointer (aka delegate) as Argument - you just give it one - inline with your lambda. Does this help?

Posted 2-Sep-13 23:35pm

johannesnestler

Updated 2-Sep-13 23:36pm

v2

Comments

YourAverageCoder 3-Sep-13 5:39am

Yes, thanks.

johannesnestler 3-Sep-13 6:50am

You are welcome. Little Addition: If you think about the syntax it's obviouse that the compiler needs something in case of no input parameters to recognize the Lambda - why .NET didn't "create" a new use for the "void" keyword is beyond my knowledge (They did it with "this" for the ExtensionMethods)...