Delegates can refer to several concepts. An object can rely on another (a delegate) to perform a function. Delegation can also refer to programming language feature making use of the method lookup rules for dispatching self-calls. In C#, a delegate defines which method to call when an event is ...

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54 views

Using delegates to avoid duplicate creation of resources

I'm writing a PCL that uses an HttpClient to go visit a few sites and extract data from them. My initial code looked like this: ...
3
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1answer
45 views

Managing a wish list from an API

I have a class that I use to manage a list to/from an API in Swift. Using a clean code approach, I'm wondering if, how, and why I should change it when I have a class that uses it for just one or two ...
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Is my Delegate defined the right way and does it need to transform to a pretty Event butterfly?

I have read so many bed time stories and ins and outs of how delegates work and why events are to be replaced with delegates (surely not all the time) and just couldn't get my head around it. I am ...
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1answer
224 views

Invoking only the last registered event handler

We are building a game and we have a dialog system. Dialogs may open and stack on top of one another. When every dialog opens, it registers itself to handle the BackButtonPressed event: ...
4
votes
1answer
182 views

Asynchronous API calls with delegates and event handlers

I'm making a WindowsPhone 8 app in C#. With this an API so I can convert JSON data into useful objects. I've found a method but am wondering if it is any good at all. The problem is it's been a while ...
6
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2answers
234 views

C# program that uses events

I am trying to learn C#. Please tell me if the following code respects coding standards and naming conventions because I want to write beautiful code. The purpose of this program was to help me ...
4
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1answer
88 views

Stop Watch Application 2.1

After the tips from my previous review. I have come up with these changes: Separation of Concerns Use Delegates I'm asking you guys if this looks good. Other then separate out the ...
2
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1answer
61 views

Mixing Watir::Browser into RSpec

In my previous Watir question I was making a module with session_FF accepting a block. Now I want to make the same but via RSpec. Here is my try: ...
25
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2answers
530 views

Wait, is this… LINQ?

Context I'm working on a little project that consists in a series of Microsoft Excel add-ins (.xlam). The code being submitted for review here, is located in the ...
8
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2answers
130 views

Generating and calling code on the fly

Delegate This class module defines what I'm calling, in this context, a Delegate - here a function that can take a number of parameters, evaluate a result, and ...
4
votes
3answers
345 views

Command-line program for applying several operations on a PDF file

I am building a command-line .exe that can apply several operations on a PDF file (add text, images, resize, crop, etc). Currently, my Program.cs looks a bit like this (it uses CommandLineParser): ...
4
votes
2answers
701 views

Lock-free multiple producer single consumer message queue

For a while now I've been after a lock-free, simple and scalable implementation of a multiple producer, single consumer queue for delegates in C#. I think I finally have it. I've run basic tests on it ...
2
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1answer
3k views

Sending a HttpRequest Message, and retrying in case of unauthorised

This code simply sends a HttpRequest message and, if it comes back Unauthorized, gets a new login and tries again. This code is meant to deal with the moment a ...
4
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1answer
756 views

.NET WCF Activator for sync and async calls

I decided to re-write my code responsible for WCF calls, as all of my methods had try-catch-...
7
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2answers
7k views

Is this a correct use of using protocols and delegate pattern in Swift?

I am trying to grasp the concept of delegates and protocols in Swift. So I have implemented my own PlayableMedia protocol with two concrete classes ...
6
votes
1answer
291 views

Retry logic for delegates

I created this class which supposed to take a method and try to execute it. If it fails lets say 10 times, it will throw the original exception thrown by the delegate. Do you have any ideas for ...
5
votes
1answer
122 views

Financial app for retrieving data over a set of dates

I'm writing a financial app that has to get data over a set of dates. The user specifies the start date, end date, and frequency from a list of choices. (daily, weekly, monthly, quarterly, semi, ...
3
votes
3answers
1k views

Test questions - Number Generator, Linq, Delegates, Sequences

I have recently been asked to do a test prior to an interview to test my C# skills. I am fairly new to C# (6 months) and I think this showed with me producing an overly complex answer to their ...
6
votes
1answer
230 views

Delegate and Observer pattern implementation for an embedded system - copy and assignment operations

This is a follow-up to this question, which resulted in major confusion on my side regarding forwarding of arguments. Advice regarding that should probably be given in my question on SO. Overview ...
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2answers
469 views

Delegate and Observer pattern implementation for an embedded system

I'm writing a set of simple widgets for a microcontroller application. I'd like to use the observer pattern to pass around events: when a button is clicked, when a timeout occurs - there are many uses ...
7
votes
2answers
428 views

Game passive skill system

I'm trying to create some easily accessible database of different skills. General idea is that every skill should do something different and be able to act on different things (ex. one skill which ...
2
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1answer
1k views

Delegate that selects a writable property on a generic

In the following contrived example, I have a collection of PropertyManagers that each contains selector and assigner delegates to read from and write to a property ...
3
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2answers
93 views

follow-up review of a custom Undo Manager

This is a follow up review of question 'a custom Undo Manager'. After reviewing all the comments and answers, my code has been revised (completely rewritten) based on the review. Summary The ...
7
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3answers
978 views

A custom Undo Manager

I am working on building an UndoManager in C#. The concept is to store events and property changes in a ...
2
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1answer
2k views

C++ delegate implementation with member functions

I have been implementing a delegate class with C++11 that supports class member functions. I am interested in knowing if there are any potential problems with this implementation. My main concern is ...
2
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2answers
311 views

Implementation of delegates for flight operations

I borrowed the code from this question. I'm trying to implement the delegate in that code. Below is my outcome so far. What else can be done to improve this code? Any suggestions? I would appreciate ...
2
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2answers
202 views

Refactoring Into Generic Methods

This might be a loaded question, but here goes. I have some code that is very similar between all the methods. I am trying to find a way to accomplish all methods with a generic method/function. I'm ...
2
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2answers
3k views

Designing an EventHandler in C++ [closed]

I am writing a simple event handling class in C++, to avoid having delegate registration and calls cluttering the rest of the code. I have a design that seems to do the job, but it has a couple of ...
4
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1answer
228 views

State Machine for Character

I come today with a state machine I'm currently working on. Problem: Given any State that the Character is in, a button press or combination of button presses can modify that state in a different ...
5
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1answer
1k views

Generic method for database calls

Background Breaking from MVC, I've implemented the following architecture: POST/GET ➤ PHP ➤ Database Calls ➤ XML ➤ XSLT ➤ HTML All database interactions are ...
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1answer
106 views

Refactoring Java transmitter delegate implementation

I have 3 classes: a transmitter, a view for displaying and a recording view for flushing the screen contents into a file. The view and the recording view classes register themselves from their ...
1
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1answer
658 views

Possible memory-leak on a self-removable event handler

A friend of mine asked me a question recently. He was needed to subscribe to an event of some object (window button click) and unsubscribe from it on a first call of a handler. Also he noticed that ...
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1answer
2k views

Using delegates to communicate between forms and networkcommunicator class

I have multiple forms, each of which would like to send message through the network, using my NetworkCommunicator class's ...
2
votes
1answer
933 views

Putting called delegate into AsyncState parameter - Pros/cons?

I have the following interface: ...
6
votes
2answers
2k views

Generic wrapper for a task-based API

The idea was to provide a clear-looking, type-inferring framework to test a task-based API (it's for integration testing, and test methods should be as clear as possible). All the tested API ...
2
votes
1answer
207 views

Delegate for GUI project

I wrote simple delegate in C++11 for my GUI project. I think that some parts can be optimized or cleaned. ...
8
votes
1answer
2k views

using <T> in generic delegates?

Here is my problem. Do I need to give a new identifier to each delegate I write of the following delegate type? like so: or could i use one delegate that accounts for any Datatype I need to use so i ...
4
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2answers
195 views

How to simplify these delegate functions?

I'm looking for a way to simplify this code, because I could develop more overloads for TryThis I made the string and int both of class ...
3
votes
1answer
485 views

Cancelable thread worker

My goal was to create class, that can run external method in non blocking manner. Second requirement was to be able to abort method run if it is needed (i.e. running user script). I decided to do that ...
2
votes
1answer
221 views

Is it correct to use delegates as properties?

I need to create a class with two properties: LogOutput ExceptionOutput These properties (of type ...
5
votes
1answer
6k views

Polling loop to run in a background thread

I came up with the idea of a small utility class that will poll some delegate until the response received meets some condition, upon which it will notify the main thread which can take the appropriate ...
4
votes
1answer
1k views

WeakAction Implementation

Here's my first attempt at creating a WeakAction using Expressions and Delegates. I would like it to be clear that this code was written after reading serveral blogs and taking snippets from various ...
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votes
4answers
1k views

Thread-safety and delegates with generated numbers

In the main class, loops generate numbers (0~100), and when its generated number is > 20, its value is passed to the thread where it simulates some work with this number. Meanwhile, while this number ...
4
votes
3answers
820 views

Improve my Task Loops

How can I improve up this code? Is it ok to write code using Invoke and Action so liberally or is this bad? Performance is not ...
2
votes
1answer
329 views

Anything I'm missing on this delegate implementation?

Just as the question states and to be sure, am I missing anything on this? Something important/obvious that I overlooked? As is, I can save any functor, function pointer and member function pointer ...