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1answer
279 views

Understanding C# Delegates Structure

I've been trying to understand C# delegates using Pro C# 5. In short, the author describes the motivation for delegates as a structured way of dealing with function pointers and callbacks or two-way ...
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0answers
23 views

Own Exception or Delegation design pattern to exit a program?

I am writing an application in Java which use MVC pattern design. I have 4 major classes: Main, Controller, Model, View. Main initialize the other three and run launchMenu() in a infinite loop, a ...
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0answers
126 views

Delegate method privately called from delegate itself?

One has established design patterns so ingrained in their brain, that when sometimes somebody does something unexpected, it is a revelation. My colleague in an iOS project did call the delegate ...
0
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1answer
59 views

Is it fine for a class that creates objects to delegate them?

I have a large list of intercommunicating components; so I decided to have one class create all of them and then subsequently delegate them to other classes to facilitate finer tweaking and wiring ...
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0answers
104 views

Run a function when a function in a list is executed?

Goal: I'm currently doing an MVC project and I have this method to update the ViewBag (based on previous actions of the user). I would like to call this function whenever a certain list of MVC Actions ...
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4answers
745 views

C# Delegates are immutable - but why does that matter?

This is a followup question to this other question. Background Working from the MSDN Delegates Tutorial (C#), I see the following: Note that once a delegate is created, the method it is ...
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7answers
3k views

Why would I ever use delegates if I'm not doing events? [duplicate]

I am trying to learn how to do events in C#, and according to the MSDN Events tutorial, Events are declared using delegates. If you have not yet studied the Delegates Tutorial, you should do so ...
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6answers
761 views

Do delegates defy OOP

I'm trying to understand OOP so I can write better OOP code and one thing which keeps coming up is this concept of a delegate (using .NET). I could have an object, which is totally self contained ...
3
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3answers
681 views

Why use protocol, not call the method directly?

I was asked this question in an interview. For eg: UITableviewDelegate protocol has CellForRowAtIndexpath. Why make it a delegate method in a protocol not a method in the UITableView class and call it ...
4
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2answers
8k views

What is Delegation and why is it important in iOS programming?

At the moment I am teaching myself iOS programming, and one concept I find really hard to wrap my head around is delegation. What is it? Why and how is it used? What is the advantage? The technical ...
2
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2answers
311 views

Template method within one class without subclasses or inheritance

I have an algorithm with mostly invariant parts that needs to be reused within one class so as to stay DRY. Code duplication with repeating method structure public void save(String key, int value) ...
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5answers
5k views

What are the advantages of the delegate pattern over the observer pattern?

In the delegate pattern, only one object can directly listen to another object's events. In the observer pattern, any number of objects can listen to a particular object's events. When designing a ...
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2answers
1k views

MVC and delegation

I am a beginning iOS programmer and use the Model-View-Controller model as a design pattern: my model doesn't know anything about my view (in order to make it compatible with any view), my view ...
2
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2answers
1k views

Strategy vs Delegates

Can the Strategy design pattern entirely replace delegates? In Java, for example, there are no delegates. Is it possible to gain all the features of delegates by using Strategy design pattern? ...
4
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1answer
682 views

Need to process 2 million 100k messages per second and route them to a particular event, delegate or multicast delegate

I need to process 2 million messages per second (perhaps in a scale out configuration) and route each message to a N delegates or multicast delegates. Question How should I structure my application ...
6
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2answers
430 views

Delegates and events

What is the difference between public delegate void SecondChangedHandler(Object clock, TimeInfoEventArgs ti); public event SecondChangedHandler OnSecondChanged; and public event ...
4
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2answers
1k views

How do delegates fit into ASP.NET?

A developer told me they used delegates to bind most of their events in ASP.NET. Until then, I did not even know it was possible to use delegates in ASP.NET in a meaningful way. My understanding ...
7
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4answers
358 views

Can you overuse delegates and events

I've just started getting to grips with event driven programming and I'm finding delegates and events to be very useful. Since starting to see the potential I've began using them all the time to solve ...
2
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5answers
262 views

Delegate vs Method

Is there any advantige using delegates instead of methods? For example: public void LoginAuthenticate(object sender, AuthenticateEventArgs e) { if (Membership.ValidateUser(lgUserLogin.UserName, ...
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5answers
2k views

How would you teach C# delegate to a newbie? [closed]

I was reviewing Andrew Troelsen book on C# 4.0. The part that explains delegates starts as smooth as: public class SimpleMath { //declare delegate public delegate int BinaryOp(int x, int y); ...
3
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2answers
599 views

Delegate pattern for retrieving data v.s. using simple setters

I am considering using the Delegate Pattern to get some data necessary for an operation. There are a few different pieces of data that the algorithm needs to run, but they all have default values that ...
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10answers
21k views

Real world use of C# Delegates [closed]

I think that I conceptually understand C# delegates, however, I am struggling to find a real world example where they would be useful. Can you provide some answers detailing how C# delegates were ...