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atoi and itoa conversions in C++11 -- FangLu

By Blog Staff | Sep 3, 2014 02:43 PM | Tags: basics

All your friends know about C++11's new stoi and to_string, right? If not, here's a quick refresher to share:

atoi and itoa conversions in C++11

by FangLu

The key reminder from the article:

... The atoi and itoa conversions in C are not very satisfying to programmers, because programmers need to deal with invalid input and exceptions to avoid worst case. On the other hand, these functions are straightforward and easy to use. So they are not rare in C++ code...

In C++11, global functions, such as std::to_string, std::stoi/stol/stoll are introduced to implement atoi/itoa conversions conveniently. For example:

string s;

s += to_string(12) + " is int, ";

s += to_string(3.14f) + " is float.";

cout << s << endl;

where to_string can do type conversion according to the parameter type.

Here is another example:

string s("12");

int i = stoi(s);

cout << i << endl;

Fun with Lambdas: C++14 Style (Part 3) -- Sumant Tambe

By Blog Staff | Sep 3, 2014 02:32 PM | Tags: c++14 advanced

sumant-tambe.PNGMore rapid-fire "now write this using lambdas" problem-solution drill with Sumant Tambe:

Fun with Lambdas: C++14 Style (Part 3)

by Sumant Tambe

From the article:

Now that we have C++14, it has opened up doors for truly mind-bending uses of lambdas--more specifically--generic lambdas. This blog post is the third installment in the series of "Fun with Lambdas: C++14 Style". Check out part 1 and part 2 if you have not already.

This post is about "monadic tuples"...

CppCon: Call for Lightning Talks, Take 2 -- Boris Kolpackov

By Blog Staff | Sep 1, 2014 02:13 PM | Tags: None

CppCon minus one week:

Call for Lightning Talks, Take 2

by Boris Kolpackov

From the announcement:

As part of getting ready to come to CppCon 2014, please consider presenting a Lightning Talk. All attendees (as well as anyone nearby who is taking advantage of the free evening content without registering) are eligible to present a 5 or 15 minute session on Tuesday evening. While the first Call for Lightning Talks has more details on what we’re looking for, we’re open to talks from new speakers, from experienced speakers, from those who work mainly in another language and are visiting C++, from those who work in C++ all the time -- everyone! If there’s one tool you just love using, one technique or best practice you’d like to share with others, or one thing you think is pretty darn funny, please see if you can make it into a 5 or 15 minute talk and share it Tuesday evening. There will be a projector and there will be an audience so why not “give it a go” and see what happens?

We’ll be selecting the 8 sessions on Monday, Day 1 of the conference. Just email [email protected] and tell us what you want to talk about, what length you need and a little bit about yourself -- one sentence is fine. Your topic should be relevant to CppCon attendees but doesn’t need to be about C++ -- we’d love to see “Why C++ developers should also know [language]” for example. Even if you don’t plan to submit, plan to attend, it’s sure to be fun!
 

C++ User Group Meetings in September

By Meeting C++ | Sep 1, 2014 01:46 AM | Tags: user groups community

This time for September - the monthly overview on C++ User Group Meetings:

C++ User Group Meetings in September

by Jens Weller

From the article:

The monthly overview over the upcoming C++ User Group Meetings. This time a few new user groups meet, and as summer comes to an end more meetings might get scheduled in the next days. But due to me going to CppCon, I have to post this a bit earlier then usual.

The list of upcoming meetings:

    3.9 C++ UG London - Cross Platform Games: iOS to Android
    10.9 C++ UG San Francisco/ Bay area - Presentation and Q&A
    11.9 C++ UG Dresden
    15.9 C++ UG NRW/Dortmund
    17.9 C++ UG Düsseldorf - Treffen der C++ User Gruppe NRW
    17.9 C++ UG Hamburg - Praktische Übersicht über Valgrind
    17.9 C++ UG Seattle/northwest - Parallelism in the Standard C++: What to Expect in C++ 17
    20.9 C++ UG Pune, India - C++ and Boost Pune first meetup
    23.9 C++ UG Chicago - See you in September
    24.9 C++ UG San Francisco/ Bay area - Workshop and Discussion Group
    25.9 C++ UG Rhein-Neckar - September Meeting
    25.9 C++ UG London
    26.9 C++ UG Istanbul
    2.10 C++ UG Paris - C++ & Python

Cinder 0.8.6 released

By Blog Staff | Aug 29, 2014 09:35 AM | Tags: None

In case you missed it:

Cinder 0.8.6 Released

The award-winning C++ graphics library Cinder has been updated with support for:

  • New audio API
  • WinRT and DirectX 11 support
  • Unicode APIs for UTF-16 and UTF-32 strings
  • Path2d extensions for calculating tangents and Bezier optimizations
  • New events for foregrounding/backgrounding apps
  • And more

Journey to the Alps: Participating in the C++ Standardization Process

By nwilson | Aug 26, 2014 11:44 AM | Tags: basics

Recently on the Spot blog:

Trip Report: Journey to the Alps -- Participating in the C++ Standardization Process

by Nathan Wilson

From the article:

... At Spot Trading, we currently utilize many of the C++11 features -- lambdas, keyword auto, nullptr, move operations, constexpr, range based for loops, explicit overrides, atomic operations, threading, futures, and new pointer types. Bjarne Stroustrup has said that we want to be able to continue to make simple things simple. These features of the language, mentioned above, certainly do that...

A coding dojo for Meeting C++

By Meeting C++ | Aug 26, 2014 03:38 AM | Tags: conference

I've just added something new to Meeting C++:

A coding dojo for Meeting C++

by Jens Weller

From the article:

I've just added something new to this years Meeting C++ schedule: a coding dojo...

Shortly after the announcement of this years conference Sven Johannsen and Detlef Wilkening approached me at a user group meeting, if it would be possible to include a coding dojo into Meeting C++. coding dojos are fun, and we already had two at my own user group, so I liked the idea. But first wanted to see how the general audience would vote on it as part of the talks.

The Idea was received well, but couldn't get high enough to justify a talk session being used. So, now the coding dojo will be placed in the lunch break of the first day. As this break is a bit longer anyway, you are able to have lunch and participate in the coding dojo. It will be moderated by Detlef Wilkening and Sven Johannsen.

Demystifying C++ lambdas -- Feabhas

By Blog Staff | Aug 25, 2014 11:02 AM | Tags: None

In case you missed it:

Demystifying C++ lambdas

by Feabhas

From the article:

Lambdas are one of the new features added to C++ and seem to cause considerable consternation amongst many programmers. In this article we’ll have a look at the syntax and underlying implementation of lambdas to try and put them into some sort of context.