March 19-21, Madrid, Spain
April 1-4, Bristol, UK
June 16-21, Sofia, Bulgaria
By Meeting C++ | Apr 27, 2014 08:05 AM | Tags: qt basics
Recently I had to implement a simple version of a bar graph widget in Qt:
Writing a bar graph widget in Qt
by Jens Weller
From the Article:
Today I had a little fun with Qt and wrote a widget for displaying a bar graph. I have two different situations where I need the bar graph in my back end: displaying the votes a single talk got, and displaying one big bar graph of all the talks.
By Blog Staff | Apr 17, 2014 05:22 AM | Tags: patterns intermediate basics
Doug Schmidt's C++-based software design course is available on YouTube.:
CS 251: Intermediate Software Design in C++
by Douglas Schmidt
This video playlist contains screencasts from a course I'm teaching on advanced C++ and object-oriented patterns/frameworks in the Spring of 2014 at Vanderbilt University. Please see http://www.dre.vanderbilt.edu/~schmidt/cs251/ for more information on this course.
Topics covered include:
About the instructor:
Douglas C. Schmidt is a Professor of Computer Science, Associate Chair of the Computer Science and Engineering program, and a Senior Researcher at the Institute for Software Integrated Systems, all at Vanderbilt University. He has also been the Chief Technology Officer for the Software Engineering Institute at Carnegie Mellon University, where he was responsible for directing the technical vision and strategic R&D investments.
C++ developers will know of Doug particularly because of his widely-acclaimed ACE and related libraries.
By Blog Staff | Apr 17, 2014 04:02 AM | Tags: intermediate basics
On the Oracle Tech Network, a nice reminder of the still-"new"-to-some hash-based containers, co-authored by the chair of the U.S. C++ standards committee:
Understanding the New Set and Map Containers in the C++11 Standard Library
by Steve Clamage and Darryl Gove
From the article:
One of the areas in the new C++ standard that has seen the most enhancement is the Standard Library. The functionality that is most likely to be immediately useful to developers is the additions to the container classes. This article describes the new set and map containers.
By Blog Staff | Apr 16, 2014 05:58 AM | Tags: intermediate basics
A classic on SO:
Why do we copy then move?
I saw code somewhere in which someone decided to copy an object and subsequently move it to a data member of a class. This left me in confusion in that I thought the whole point of moving was to avoid copying. Here is the example:
struct S { S(std::string str) : data(std::move(str)) {} };Here are my questions:
- Why aren't we taking an rvalue-reference to
str?- Won't a copy be expensive, especially given something like
std::string?- What would be the reason for the author to decide to make a copy then a move?
- When should I do this myself?
By Blog Staff | Apr 15, 2014 11:48 AM | Tags: basics
Quick: Would you resort to stringstream? But that's so C++98... and so hard.
More people need to know about to_string and its cousins. Marius Bancila takes us for a short tour:
The standard way of converting between numbers and strings in C++11
by Marius Bancila
From the article:
C++11 provides several standard functions for converting numbers to strings and strings to numbers, all of them available in the
<string>header.For converting numbers to strings there are two new overloaded functions:
to_string()andto_wstring(). They take one argument of various numeric types (int,long,long long,double,long double, etc.) and return either astd::stringor astd::wstringwith the number converted to text. ...For the other way around of converting strings to numbers there are several overloaded methods (taking either a
std::stringor astd::wstring): ...
By Blog Staff | Apr 15, 2014 04:10 AM | Tags: intermediate basics advanced
If you've been thinking of registering for CppCon, you can save by doing it in the next couple of days. Over at CppCon.org, Boris Kolpackov reports:
Super Early Bird Last Chance
In the past couple of weeks a lot of C++ enthusiasts have registered for CppCon 2014 and as a result we only have about 20 super early bird entries left. If you are planning to attend, this is your last chance to register at the most affordable price.
After the limited Super Early Bird is full, Early Bird registration will be available until the end of June. Student registrations are also available at a heavily subsidized rate to ensure students can take advantage of the program.
See also the Call For Submissions to see the kinds of topics that you can expect to see covered.
By Blog Staff | Apr 4, 2014 12:15 PM | Tags: basics
+1 for linking to the current FAQ.
Yesterday on Bulldozer00:
Looks Weird, But Don’t Be Afraid To Do It
by Tony DaSilva
Before C++11, you’d have to be tripping on acid to allow a C++03 function definition like this to survive a code review:
std::vector<int> moveBigThingsOut() {
By Blog Staff | Apr 4, 2014 11:09 AM | Tags: performance intermediate efficiency basics
A recording of yesterday's //build/ talk by Herb Sutter is now available on Channel 9:
Modern C++: What You Need to Know
by Herb Sutter
This talk will give an update on recent progress and near-future directions for C++, both at Microsoft and across the industry. This is a great introduction to the current state of the language, including a glimpse into the future of general purpose, performance-intensive, power-friendly, powerful native programming.
From the advance description on Herb's blog:
I was asked to give a "foundational talk" about C++, and I decided that meant I should focus on addressing two questions that I get a lot these days:
- FAQ #1 (1-2 slides): When should I use C++ compared to another language -- on all platforms in general, and on Microsoft platforms in particular?
- FAQ #2 (lots of slides): What should I know about C++ if I’m a {Java|C#|JavaScript|Python|...} developer?
Even if you're a seasoned C++ developer, there are some nuggets and data points in the middle of the talk that I think you will find useful in your own work...
By Blog Staff | Apr 4, 2014 09:35 AM | Tags: basics
In the "know your STL algorithms" department, this on the codexpert blog:
Assigning algorithms in the C++ Standard Library
From the article:
The C++ Standard Library provides several algorithms for assigning values to a range (such as a container or a C-array). ...
By Blog Staff | Mar 31, 2014 10:17 PM | Tags: intermediate c++11 basics
A recently posted talk by BitTorrent's chief architect:
C++ in the 21st Century
by Arvid Norberg
From the announcement:
In this edition of Tech Talks: an overview of some C++ gems. I threw this talk together because my team was about to start a new project in C++11. Since it’s fairly new, I figured some of it might not be as well-known as it should. Fundamentally, I’m pretty excited about all the new possibilities in C++11. Even higher-level abstractions, at even lower cost than C++98.
In the video below, we go over for-loops, automatic type deduction, lambda functions and more.