This guy is a gem in teaching. His way of teaching the concepts. Would love to see more videos of yours on C++14, C++17 and C++20. Bo Qian, please upload more videos.
I honestly love your videos, I have been away from C++ for quite some time and just recently going back to it. 20 minutes did helps me a lot on catching up with C++11. Thank you so much ^_^ Will go through all your related videos too :)
Coming back from C# to C++ I found out most of these quite intuitive. I figured out most of them on my own (and some googlefoo), but this video basically confirmed what I already learned, so.. Thanks for that :D
You explained the features to the point . No clutter. And thanks a lot for also sharing the code in your website. Your video and code will help me for a long time :) Thanks again bro.
Nice video for getting into c++ 11 for beginner like me.I have one doubt whether we can create an instance of a class having final virtual method in c++11
its Amazing ! This video is very much precise and to the point . Thanks for your knowledge sharing. Though I have been still practicing C++11 feature, Eagerly waiting for videos on C++14 & C++17 feature .... Thank You again :)
Thanks BO. I need one clarification for item#13. For consexpr, the expression evaluates at compile time to avoid runtime cycles. My query is "the compilation time will be more if there is of certain code which constexpr", right?
Declaring the Initializer list, initializing the initializer list class using unique initializer list, auto variable for, strong enum, override, final,
Did you need to capture the variable(s) by reference there in the last Lambda function example, Bo? Wouldn't it have been OK just to capture the local variables by value and say this: int y = 4; filter( [=](int x) { return (x > y); }, v ); Did you need to capture by reference for the vector maybe? You're not changing 'y' at all, so that certainly could have been captured by value.
No, it is not true. That's called multiple inheritance. It is generally not recommended for beginners because it involves some pitfalls, but there are times it is found to be useful. For details see my another video of "multiple inheritance" in "Advanced C++" playlist.
That was great! I have been learning a lot from your videos. The fact that you even offer your personal notes guarantees a quick way to recap if I happen to forget some of the topics. You are awesome, thanks!
HI thanks a lot, I understand a lot of things I tried to read in some books, now I have a lot of things more clear, really good tutorials, thanks a lot. Just subscribe now...
Владислав Бондур If you make them private then these 2 functions exist and can be called for example from within the class member functions (and thus a possible source of errors/bugs). If you delete them then they cannot be called from anywhere because they do not exist. How would you use explicit to prevent using doubles? if you put like: explicit dog(int age) {} , that would not work as dog b(3.0); would still compile and convert double to int.
+TryingTo Correct You can just declare them in the private section without implementing them, they won't be callable from within the class member functions; you'll get an error link instead of a compilation one
+johan mabille ok , yes. But what is the benefit for doing like that over using delete? I think delete is more clear because it tells the intent of the situation: the creator of the class does not want that function to be used. If you declare a function without an implementation, the intent is not clear (unless you comment the code, but commenting is not a good way to solve problems anyway...): the person using the class might think that the implementation of the function has been forgotten to write and they might end up writing an empty implementation to "fix it". So, I would prefer delete over declaration... unless you give a good reason why declaration is better.
+TryingTo Correct I was just giving a way to do exactly the same thing in C++ 03. Now I totally agree with you, delete is definitely more clear and the situation you describe (a team mate wrongly "fixing" the class) is a situation I've encountered many times; concepts expressed through the language are far better than comments.
Hey Bo, Thanks for the amazing explanation. I don't see your notes are accessible at boqian.weebly.com, is there any other site or way to get your notes. Thanks Vipul
Hello Bo, tnx for all your videos, but I think using lambda functions is not "functional programming", you're just using anonymous functions as callbacks. Cheers mate
About the constexpr keyword , How come this worked without using it ? // Example program #include #include int A(int x){return x*x;} int main() { int B[A(2)+3]; B[0] = 8; std::cout
00:57 This is still bad, though, because you still have to remember to put that `override` there, and if you don't, you will still fall to that trap :q 01:45 What's the point of making a virtual function that cannot be overriden? The entire point of having virtual function is that we can override them in derived classes. 02:20 Won't simply writing `dog() {}` produce the same effect with less typing and less arcane voo doo magic? :q 04:42 Too bad that there's already a whole lot of legacy code that doesn't use `constexpr`, so you can't use those functions in constant expressions anyway :/ 05:28 It also won't fit into a 32-bit `int` :J 05:50 What if I want a raw UTF-8 string? :D GCC doesn't seem to accept `Ru8` nor `u8R` :P 07:05 So what is the type of `f` that is substituted for `auto`? ;> (in case I wanted to define a function that takes this lambda as a parameter). Also it would be nice to talk some more about the meaning and purpose of that `[]` in front of it ;) as well as `[&]` and `[=]` and stuff ;) 09:09 Well, not _that_ difficult, considering that C++ lambdas are just syntactic sugar for function objects automatically generated by the compiler. Cleaner - maybe. 09:12 Well, not really: what about rvalue references and move semantics? Trailing return types and `decltype` mess? Variadic templates? Tuples? Smart pointers? Threading? There's still a lot to cover, and I only mentioned the major things.
I've give you dislike becouse I don't like end of this video. You can substitute lambda in filter function by pointer to function or by anonymous class.
I have become a fan of your tutorials. Awesome work for educating people like me. It will be great to see more of your videos in C++14 and in C++17.
Best of introductory material on c++11 that I have seen on internet.... Thank you Bo.
A great alternative to all that exhaustively long book of Stroustrup. Thanks for sharing these videos
This guy is a gem in teaching. His way of teaching the concepts. Would love to see more videos of yours on C++14, C++17 and C++20. Bo Qian, please upload more videos.
The most simplified explanation on Lambdas in C++!!
Thanks a lot, Sir!!
I honestly love your videos, I have been away from C++ for quite some time and just recently going back to it. 20 minutes did helps me a lot on catching up with C++11.
Thank you so much ^_^
Will go through all your related videos too :)
Very simple yet comprehensive and concise presentation of the c++11 features. Thank you!
What you are doing is not something easy to do. appreciate your hard work. This is one of the best
You are just superb BO.. Just "thank you" "thank you" "thank you"
This guy rocks... short and to the point tutorials with perfect examples and explanation
Coming back from C# to C++ I found out most of these quite intuitive. I figured out most of them on my own (and some googlefoo), but this video basically confirmed what I already learned, so.. Thanks for that :D
Thank you very much.you speak so slowly and clearly that I can follow you,It's greate
You deserve so many more subscribers. Hats off to you sir!
Thanks so much! Your explain is very easy to understand. Awesome video!
You explained the features to the point . No clutter. And thanks a lot for also sharing the code in your website. Your video and code will help me for a long time :) Thanks again bro.
I learned C++ 16 years ago and a lot has changed that I needed to learn.
I love your c++ tutorials absolutely.
I love this guy. He must be a great teacher or professor!
It really helps me to learn c++11 in a short time. Impressive !
You are a genius Bo Qiang, thanks! Nice job!
This is sheer good work. Kudos to you for such simplified explanations and quick overview.
Awesome work . You have explained concepts such a way that it will take some effort to forget them. Thanks .
Amazing. Excellent video. Very concise descriptions. Thanks alot!
Wonderful learning C++ 11 video !
Thanks !!
Thank you so much Bo, cheers from Mexico.
Nice tutorials..learned a lot many things. Can you please also share the questions or any links for practice
Nice video for getting into c++ 11 for beginner like me.I have one doubt whether we can create an instance of a class having final virtual method in c++11
Awesome stuff Bo. Keep up the good work.
its Amazing ! This video is very much precise and to the point . Thanks for your knowledge sharing. Though I have been still practicing C++11 feature, Eagerly waiting for videos on C++14 & C++17 feature .... Thank You again :)
Thanks Bo. As someone coming from a C# background I find a lot of this familiar. I wonder did Microsoft have much input in the Cpp11 spec.
Thank you for sharing your c++ knowledge. I really enjoy all the tutorial
I have learned a lot , thank you Bo
Thank you very much for sharing both of your videos. Much appreciated.
Thanks BO. I need one clarification for item#13. For consexpr, the expression evaluates at compile time to avoid runtime cycles. My query is "the compilation time will be more if there is of certain code which constexpr", right?
Thank you alot Bo Qian for this C++ 11 tutorial.
Very clearly explained. But is this all? I thought there should be more like pointer types or so
Declaring the Initializer list, initializing the initializer list class using unique initializer list, auto variable for, strong enum, override, final,
Really Awesome Tutorial! Very Informative. Thanks a lot .
In the filter function you appear to be passing a copy of a vector. A reference is possible. Is this intentional?
Thanks Bo Qiang , Gr8 efforts.
straight to the points, very good!
These videos are great, thank you!
Did you need to capture the variable(s) by reference there in the last Lambda function example, Bo? Wouldn't it have been OK just to capture the local variables by value and say this:
int y = 4;
filter( [=](int x) { return (x > y); }, v );
Did you need to capture by reference for the vector maybe? You're not changing 'y' at all, so that certainly could have been captured by value.
No, it is not true. That's called multiple inheritance. It is generally not recommended for beginners because it involves some pitfalls, but there are times it is found to be useful. For details see my another video of "multiple inheritance" in "Advanced C++" playlist.
loving your videos Bo, thank you very much. Which compiler have you test the c++ 11
+Roberto Prince : g++ in gcc >= 4.8 will work. Need to add the flag -std=c++11 while compiling.
thanks I already knew that, but I was wondering at the time if I could use VS2013, but know Im using VS2015 Community and works wonderfully
Nice and clear tutorials... I am lazy, you could add a link of your website in the description :-)
loved it.just a request, i want to learn all c++11 , in one video...
Thank you for great explanations.
Great Videos as always:) Thanks for your effort! A minor typo at 6:53, return x+y missed one ";"
That was great! I have been learning a lot from your videos. The fact that you even offer your personal notes guarantees a quick way to recap if I happen to forget some of the topics. You are awesome, thanks!
what is a use of virtual final function in c++ ?
HI thanks a lot, I understand a lot of things I tried to read in some books, now I have a lot of things more clear, really good tutorials, thanks a lot. Just subscribe now...
4:40 whats the difference between contexpr and const? couldn't you achieve the same thing with const?
10/10 Explanation!!
Thank you for the excellent videos!
I think the constexpr is as same as the marco in c ,right ?
Very good, Thanks
very good tutorials. just need some pointer on practicing the materials that your tutorials have.
Mr Bo Qian can you tell me if this statement is true ?
....A class must not br derived from more than one base class.
Thank you !.
Daniel.
Extremly well made, thank you!
Hey, one clarification is needed. Is filter a lambda function?
or func is the lambda function?
About 12. delete:
Why not use "explicit" keyword, or why not make private: constructor(double) and operator=()?
Don't see the difference.
Владислав Бондур If you make them private then these 2 functions exist and can be called for example from within the class member functions (and thus a possible source of errors/bugs). If you delete them then they cannot be called from anywhere because they do not exist. How would you use explicit to prevent using doubles? if you put like: explicit dog(int age) {} , that would not work as dog b(3.0); would still compile and convert double to int.
+TryingTo Correct
You can just declare them in the private section without implementing them, they won't be callable from within the class member functions; you'll get an error link instead of a compilation one
+johan mabille ok , yes. But what is the benefit for doing like that over using delete? I think delete is more clear because it tells the intent of the situation: the creator of the class does not want that function to be used. If you declare a function without an implementation, the intent is not clear (unless you comment the code, but commenting is not a good way to solve problems anyway...): the person using the class might think that the implementation of the function has been forgotten to write and they might end up writing an empty implementation to "fix it". So, I would prefer delete over declaration... unless you give a good reason why declaration is better.
+TryingTo Correct I was just giving a way to do exactly the same thing in C++ 03. Now I totally agree with you, delete is definitely more clear and the situation you describe (a team mate wrongly "fixing" the class) is a situation I've encountered many times; concepts expressed through the language are far better than comments.
Thank You very much for this.
Good info ...
Thank you sir !!
Thank you very much
You are the best
Hey Bo,
Thanks for the amazing explanation. I don't see your notes are accessible at boqian.weebly.com, is there any other site or way to get your notes.
Thanks
Vipul
4:00 constexpr
8:32
Thank you very much!!
Very clear
what's the use of default keyword ? All you are doing is writing "=default" instead of "{}"
Hello Bo, tnx for all your videos, but I think using lambda functions is not "functional programming", you're just using anonymous functions as callbacks.
Cheers mate
It's not always functional programming, but the example that he showed is a functional style.
About the constexpr keyword , How come this worked without using it ?
// Example program
#include
#include
int A(int x){return x*x;}
int main()
{
int B[A(2)+3];
B[0] = 8;
std::cout
Love it!
Where's smart pointera
Good tutorial
00:57 This is still bad, though, because you still have to remember to put that `override` there, and if you don't, you will still fall to that trap :q
01:45 What's the point of making a virtual function that cannot be overriden? The entire point of having virtual function is that we can override them in derived classes.
02:20 Won't simply writing `dog() {}` produce the same effect with less typing and less arcane voo doo magic? :q
04:42 Too bad that there's already a whole lot of legacy code that doesn't use `constexpr`, so you can't use those functions in constant expressions anyway :/
05:28 It also won't fit into a 32-bit `int` :J
05:50 What if I want a raw UTF-8 string? :D GCC doesn't seem to accept `Ru8` nor `u8R` :P
07:05 So what is the type of `f` that is substituted for `auto`? ;> (in case I wanted to define a function that takes this lambda as a parameter).
Also it would be nice to talk some more about the meaning and purpose of that `[]` in front of it ;) as well as `[&]` and `[=]` and stuff ;)
09:09 Well, not _that_ difficult, considering that C++ lambdas are just syntactic sugar for function objects automatically generated by the compiler. Cleaner - maybe.
09:12 Well, not really: what about rvalue references and move semantics? Trailing return types and `decltype` mess? Variadic templates? Tuples? Smart pointers? Threading? There's still a lot to cover, and I only mentioned the major things.
you really rock :)
Right way to define raw string is R"(string \\)" you will receive an error without parentheses
+John Baker I'll give it a try
"congratulations, you've learned C++11 in 20 minutes", Me after 2 hours of analizing XD
That must be brutal! I mean... your bum must be hurting!
C# has most of them before long long ago.
objection. it is much better to use u8, u16, u32. instead of using different cases. I hate it.
Are you eating something during speaking?
..
.
I've give you dislike becouse I don't like end of this video. You can substitute lambda in filter function by pointer to function or by anonymous class.