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Lambda Expressions in C++

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In this interview, programming writer Thomas Petchel demonstrates how to use Lambda Expressions in C++.  You can also learn more in the topic: Lambda Expressions in C++.

Kathleen McGrath
Visual Studio User Education
http://blogs.msdn.com/kathleen

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  • Functions can maintain state if you use static to declare the variables, e.g.,

     

    int next()
    {
        static int gn = 0;
        return gn++;
    }

     

    I don't recommend doing this, but it is technically possible, contrary to what was stated in the video.

     

    Also, the second program Thomas wrote summed the primes in the range [3..20], not the first 20 prime numbers.

  • Will extension methods also be there? Smiley

  • Hi Joe,

     

    Yes, you're correct that you can use static variables to maintain state between function calls. Perhaps it's better to say that lambda expressions enable you to share state between a function and its caller, because a static local variable is only accessible from the scope of the function in which it is defined.

     

    You also caught me saying "the first 20 prime numbers". I realized later that I said this. Thanks for the correction. Devil

     

     

  • do we need them? Wink

    C++ allows non-member functions. Problem solved. Smiley

     

  • Neilneilfmorrow​00 neilfmorrow

    I think lambda are great!!! I wish more people would learn how to use them when they first start learning how to program.  I sometimes find when you are teaching the basics of computer programming to beginning programmers the old-style methods are usually the best,

  • By the way, prime numbers start with 2, not 3!

  • wtfwtf

    Where did the high quality video version go ?I can't see the text ! 

  • SanSan

    I cant see the code in the video, can you please send me the code.

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