October 25, Pavia, Italy
November 6-8, Berlin, Germany
November 3-8, Kona, HI, USA
By Adrien Hamelin | Feb 23, 2016 05:51 AM | Tags: intermediate
How to handle events?
Automatic event cleanup in C++
by Nercury
From the article:
Event subscriptions have a downside: someone has to unsubscribe. Usual approach is to make sure it happens when the subscibtion is no longer needed.
But, can we do it automatically, in a way that is easy to use and extend?
Let's see how it can be done in C++...
By Marco Arena | Feb 22, 2016 10:05 AM | Tags: performance basics
Is RAII in C++ only possible with exceptions? Eli Bendersky clarifies the matter:
C++: RAII without exceptions
by Eli Bendersky
From the article:
this post is not about whether exceptions are good or bad. What it is about is RAII as a C++ dynamic resource management technique that stands on its own and is useful with or without exceptions. In particular, I want to explain why RAII is indeed useful even if you have exceptions disabled in your C++ code...
By Felix Petriconi | Feb 18, 2016 09:13 AM | Tags: c++14 c++11 advanced
Bartlomiej explains in his recent blog post in nice details the SFINAE construct.
Notes on C++ SFINAE
by Bartlomiej Filipek
From the article:
This time I’d like to tackle a bit more complex problem: SFINAE. I’m not using this paradigm on a daily basis, but I’ve stumbled across it several times and I thought it might be worth trying to understand this topic.
What is SFINAE? Where can you use it? Do you need this on a daily basis? Let’s try to answer those questions.
In the article he goes into details of Overload Resolution, Where can I use it?, enable_if, Expression SFINAE, Any disadvantages?, and Alternatives to SFINAE.
By Meeting C++ | Feb 18, 2016 07:51 AM | Tags: qtdev intermediate basics advanced
A follow up on an older Blog post of mine:
Revisiting QWidgets & data, refactoring and performance
by Jens Weller
From the article:
My CMS project has grown quite a bit, and there are a few places where I think I should refactor the code. One of the larger ones is that TreeItem::get<T> returns a pointer instead of a reference. Another one is related to how the Qt UI application is acting when opening a new panel in the TabControl. There used to be a noticeable delay...
By Mantosh Kumar | Feb 16, 2016 10:47 PM | Tags: c++11
How to use std::async for task-based parallelism in C++11.
The promises and challenges of std::async task-based parallelism in C++11
by Eli Bendersky
From the article:
"Task-based parallelism" refers to a higher level of abstraction, where the programmer manages "tasks" - chunks of work that has to be done, while the library (or language) presents an API to launch these tasks. It is then the library's job to launch threads, make sure there are not too few or too many of them, make sure the work is reasonably load-balanced, and so on. For better or worse, this gives the programmer less low-level control over the system, but also higher-level, more convenient and safer APIs to work with. Some will claim that this also leads to better performance, though this really depends on the application.
By Adrien Hamelin | Feb 15, 2016 09:17 AM | Tags: intermediate c++11
A nice story with a goal:
One of C++ most underrated features: Namespace aliases
by Jonathan Müller
From the article:
About two months ago I wrote the following r/cpp comment:
[compte supprimé]
- You could always just alias the namespace like namespace fnc = FunctionalPlus.
foonathan
- Namespace aliases are one of C++ most underrated features.
In the thread a new library was presented. One user complained about the long namespace name, (s)he got the above replies. Judging by the number of upvotes, people seemed to agree with my comment. In this blog post I am going to elaborate it...
By Marco Arena | Feb 15, 2016 07:16 AM | Tags: c++14 basics
I'm starting a new series about how standard algorithms and containers help in solving competitive programming challenges. Here is an introduction:
C++ in Competitive Programming: intro
by Marco Arena
From the article:
In the last two years I have turned into a Competitive Programming aficionado, mostly active on HackerRank, less on TopCoder and CodingGame...
By Meeting C++ | Feb 11, 2016 06:36 AM | Tags: performance intermediate efficiency c++14 c++11 boost basics advanced
My series on building applications with Qt an boost continues:
Searching and replacing in strings with boost
by Jens Weller
From the article:
The next big milestone for my CMS is to actually generate HTML files, and I'm almost there. I'll reach it in the next two weeks, most code is written, just a little bit of refactoring is needed. This blog post is about searching and replacing in strings. As I started last week with implementing the functionality, that turns the data in my CMS into an HTML website.
There needs to be a lot of text transformed, in order to turn a shared structure like a cross page layout into a single, special HTML file, one of those transformations is, to replace the internal links with the correct links. A link to a different page in the same website cannot be represented as a text link, instead it is represented by a linkid, which corresponds to the Page it points to. This is to have still the correct link, if the page is renamed or moved...
By Adrien Hamelin | Feb 11, 2016 02:50 AM | Tags: c++14 advanced
ACCU’s Overload journal of February 2016 is out. It contains the following C++ related articles.
Overload 131
From the journal:
Defining Concepts
Concepts provide a new way of constraining code. Andrew Sutton shows us how to define and use them. by Andrew Sutton
On Zero-Side-Effect Interactive Programming, Actors, and FSMs
Functional programming is alien to many programmers. Sergey Ignatchenko considers parallels between actors and finite state machines.
Template Programming Compile Time Combinations & Sieves
Functional style frequently uses sequences. Nick Weatherhead applies these ideas to combinations in C++. by Nick Weatherhead
Classdesc: A Reflection System for C++11
C++ lacks direct support for reflection. Russell Standish brings an automated reflection system for C++, Classdesc, up to date. by Russell Standish
QM Bites : Maximising Discoverability of Virtual Methods
C++11 introduced override as a contextual keyword. Matthew Wilson encourages us to use it. by Matthew Wilson
So Why is Spock Such a Big Deal?
Spock testing in a Java environment is all the rage. Russel Winder talks through the history of testing on the JVM and demonstrates why Spock is so groovy. by Russel Winder
By Adrien Hamelin | Feb 11, 2016 02:43 AM | Tags: c++11 basics
And emplace_back function:
Modern C++ features: in-place construction
by Arne Mertz
From the article:
Move constructors are often cheaper than copy constructors, which makes the construction and immediate relocation of objects in modern C++ more effective than in C++03. However, just moving the parts needed to construct the object in the right place can be even more effective. Several standard library functionalities use perfect forwarding to construct objects right where they are needed.