C++ 11 Lambda Functions

In this video we'll look at a new style for implementing anonymous functions in C++ 11 and above. They're called Lambda functions, and they allow us to define little functions right where we need them, instead of adding a prototype, and a function in some header.

The Lambda syntax does not offer anything we could not otherwise program, but they are convenient, and they can help to reduce the overall amount of code in our projects.

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[naganikhilbijjala]

Best video for Lambda functions. I wasted a lot of time with other articles and videos and finally came here. Your explanation is awsome.

[benvaldivieso]

Thank you sir for posting the only lambda tutorial that makes any sense whatsoever, finally

[zijiezhou]

This is absolutely the clearest video for explaining the lambda function in C11! 😃

[krantimadineni]

OH! This is an amazing video ever made on c++11 Lambdas...All my doubts about Lambdas got resolved today. Thank You great man.

[Muhammad_Waleed]

"And You are all bunch of Legends" touched my Heart❤️
Thank You Sir
I have been trying to learn lambda functions from websites and didn't understand a single word
A teacher is really Important Thanks a Lot again ❤️

[HiltonFernandes]

Amazing !

Certainly the best introduction to C++ lambda functions, both in breadth of coverage and good humor.

[shvideo]

A great tutorial that builds gradually from the very basic to the more complex syntax, explaining all the aspects of lambda functions so clearly. Thank you!

[Kenforbes]

Best Lamda introduction I've found, very helpful. Thank you!

[frozenfirebat]

Man, you just made my day... I've been trying to pass a complicated line of code into a std::thread for days now, and the Lambda function solved it.

[logomoniclearning]

best lamda function explanation on the tube yet

[communistgoatboy]

"i and g are read-only because we're passing by value to the body of our lambda."

That's not _quite_ right. A lambda with a capture list is actually a functor whose `operator()` is const. When a variable is captured by value, it becomes a data member of the functor. Because const functions can't modify their data members (by default), then you can't modify variables captured by value. A reasonable person might then think that capturing by reference would capture by const reference. But no. Someone decided that capturing by reference would be done non-const. There is a way to allow const member functions to modify their data members: by marking them _mutable_. You can also do this with lambdas.

int i = 3;
auto f = [i]() mutable { i = 4; return i; };
std::cout << f() << std::endl;

This becomes quite useful when using the non-mutating standard algorithms on containers of third-party classes that aren't const-correct. This can be a real pain in the jacksie!

As an aside, lambdas with an empty capture list can "decay" into classic function pointers because they aren't functors as they don't need any state.

Thanks for another great video! Have you thought about making a video on combining C++ and assembly? I would definitely watch it!

[poganka]

best lambda explanation on the internet, thanks

[djpeterson]

In your "simplest lambda", I think you can omit the parenthesis and make it even simpler:

[]{};

(Works in Visual Studio at least, but I think this is standard).

[mohanrajanna]

Understanding lamba is made very easy here. Thumps up for posting the video.

[IceScream]

amazing toturial finally somebody explains clear and with good examples!! thank you for the order man!

[AegirAexx]

Great video. You pushed me over the threshold. I'm finally understand lambdas. Thank you!

[danielgospodinow]

""The return of the Lambda", haha sounds like a horror film." HAHAHA, love your tutorials!

[shrimpfights]

Clearest video ive watched on this thank you

[alski]

Outstanding simplicity and informative. Top notch!

[majoro]

You're the good legend here Creel :D

Awesome high-quality content, generally detailed low-level explanations, and cool Aussie accent. Gotta love this channel!

Wish I could be a supportive patron, but can't from here. :/ Salutes from Syria anyways. :P

(The hype of "Return of Lambda" is unprecedented). xD