anonymous-methods

I'm new to SO and programming and learning day by day with bits and pieces of tech (C#) jargons. After Googling for a while, below is what I've researched about methods A Method is a block of statements, which serves for code reusability & it also supports overloading with different SIGNATURE....for ex: drawShape(2pts), drawShape(3pts) etc... An Anonymous method is one with block of statements, but no name....(as its premature to ask, in wt situation we come across anonymous method...any articles, samples ...) Named method : Here's a link but at the end i didn't get what Named Method actually

I am learning C#.Can I mean closure as a construct that can adopt the changes in the environment in which it is defined. Example : List<Person> gurus = new List<Person>() { new Person{id=1,Name="Jon Skeet"}, new Person{id=2,Name="Marc Gravell"}, new Person{id=3,Name="Lasse"} }; void FindPersonByID(int id) { gurus.FindAll(delegate(Person x) { return x.id == id; }); } The variable id is declared in the scope of FindPersonByID() but t we still can access the local variable id inside the anonymous function (i.e) delegate(Person x) { return x.id == id; } (1) Is my understanding of closure is

I'm trying to create a function that can create an Action that increments whatever integer is passed in. However my first attempt is giving me an error "cannot use ref or out parameter inside an anonymous method body". public static class IntEx { public static Action CreateIncrementer(ref int reference) { return () => { reference += 1; }; } } I understand why the compiler doesn't like this, but nonetheless I'd like to have a graceful way to provide a nice incrementer factory that can point to any integer. The only way I'm seeing to do this is something like the following: public static class

I have the following code: class myClass { private delegate string myDelegate(Object bj); protected void method() { myDelegate build = delegate(Object bj) { var letters= string.Empty; if (someCondition) return build(some_obj); //This line seems to choke the compiler else string.Empty; }; ...... } } Is there another way to set up an anonymous method in C# such that it can call itself? You can break it down into two statements and use the magic of captured variables to achieve the recursion effect: myDelegate build = null; build = delegate(Object bj) { var letters= string.Empty; if

I instantiated an object of an anonymous class to which I added a new method. Date date = new Date() { public void someMethod() {} } I am wondering if it is possible to call this method from outside somehow similar to: date.someMethod(); Good question. Answer is No. You cannot directly call date.someMethod(); Let's understand first what is this. Date date = new Date() { ... }; Above is anonymous(have no name) sub-class which is extending Date class. When you see the code like, Runnable r = new Runnable() { public void run() { } }; It means you have defined anonymous(have no name) class which

A lot of questions are being answered on Stack Overflow, with members specifying how to solve these real world/time problems using lambda expressions . Are we overusing it, and are we considering the performance impact of using lambda expressions? I found a few articles that explores the performance impact of lambda vs anonymous delegates vs for / foreach loops with different results Anonymous Delegates vs Lambda Expressions vs Function Calls Performance Performance of foreach vs. List.ForEach .NET/C# Loop Performance Test (FOR, FOREACH, LINQ, & Lambda) . DataTable.Select is faster than LINQ

I thought it would be nice to do something like this (with the lambda doing a yield return): public IList<T> Find<T>(Expression<Func<T, bool>> expression) where T : class, new() { IList<T> list = GetList<T>(); var fun = expression.Compile(); var items = () => { foreach (var item in list) if (fun.Invoke(item)) yield return item; // This is not allowed by C# } return items.ToList(); } However, I found out that I can't use yield in anonymous method. I'm wondering why. The yield docs just say it is not allowed. Since it wasn't allowed I just created List and added the items to it. Eric Lippert