Back to Basics: Lambdas from Scratch - Arthur O'Dwyer - CppCon 2019

[@ZhaoWeiLiew]

Thanks so much for the back to basics series! As a beginner, it has helped me immensely in learning C++. I especially love Arthur’s talks!

[@CppCon]

Great to hear!

[@kamilziemian995]

I think that everyone can learn something important from "Back to Basics" talks. Even speakers themselfs. 😉

[@alexkfridges]

This is an EXTREMELY good talk. What an absolute legend

[@ChrisOffner]

31:45 C++ in a nutshell: "... and we can collapse it all down and replace it with one pair of every kind of brackets, and we get something called a generic lambda. Notice that our template parameter T has disappeared, and instead I'm just writing "auto". This is special syntactic sugar, this is not necessarily obvious but "auto" has something to do with type deduction, type inference. So here, when I write "auto" in the parenthesis, it's not the same "auto" that you would see somewhere else ... This is just a shorthand indicating that this lambda's call operator that takes an argument named "x" is actually a template." 😂😭

[@bhaskyOld]

As a embedded C programmer, I find it is very interesting. Great effort to reduce the size of code segment. But I feel intimidated by the varity and vastness of coding syntax to remember in C++. C syntaxes are still very small and easy to remember. I am not sure if it is only me feeling this way.

[@prem9501]

No, you’re not alone. I am also an embedded C programmer. I feel the same. C++ is vast and confusing.

[@vercolit]

I agree, I came to C++ from C, since my company used it extensively. But imo, you don't need to know every single detail of C++ to use it pretty effectively. It gives a lot of freedom in designing your solution to a problem, and you generally are able to find several, which all use different features.

[@hsubyron2277]

Friendly to c++ to a newbie!

[@edinetgrunhed6000]

finally a clear and concise explanation

[@jvsnyc]

At 22:30 I understand the eye rolls some emit when they hear others say "Aren't lambdas just new syntax for function pointers?" -- maybe approximately if no captures take place, otherwise, no.

[@asifrizwan42]

Nicely explained, especially for c programmers. Clear and simple way to understand lambdas.

[@佐邱鸣]

Loud and clear!

[@strakhov]

Excellent talk, thank you!

[@CppCon]

Glad it was helpful!

[@dayumnson9769]

great talk, finally somewhat understanding lambdas. thank you!

[@idanbismut2954]

Awesome talk !! good explaining, very clear

[@CppCon]

Glad it was helpful!

[@tysontakayushi8394]

Wow! Thanks a lot! Now I understand lambdas.

[@CppCon]

You are most welcome

[@27harishvk]

crisp.. no nonsense... just what is required to know lambda.

[@ArpitAgarwal1]

this was an excellent talk. Thanks

[@vadymsenkiv6087]

Great talk, thanks!

[@CppCon]

Glad you enjoyed it!

[@rastaarmando7058]

bro, you're incredible!

[@kamilziemian995]

23:25 This explains well, why I abhor implicit conversion in C++.

[@flyer0014]

Great talk

[@raviayyagari9718]

Question - why Recursive Lambdas was left out ? Another excellent talk Arthur. I have been using Plusme analogy whenever I get stuck

[@chrissherlock1748]

C++ 23 will likely allow them

[@dacodastrack7271]

Awesome thanks!!

[@ifay1]

excellent talk!

[@jonnyabatti5120]

they seem quite useful but incredibly hard to read or interpret sometimes.

[@anoopsrana]

Errata @22:01 . The code shown at 22:01 is ill-formed.

[@kamilziemian995]

20:30 Why this code is written using stdio.h and printf, that are taken stright from C?

[@numv2]

Excellent

[@heater5979]

Are people really expected to be able to write code with all this syntactic/semantic complexity ? How many years are they expected to study C++ before they can do anything?

[@jvsnyc]

Having watched some other Arthur O'Dwyer cppcon talks I thought you were being defeatist, but dang, this is for sure a "watch three times" video. Hats off to anyone who didn't know this already that learns everything on one viewing.

[@jorenheit]

Need... to.... resist...

[@bharat101976]

There are type error at 13:28. vector v is undefined. This is shelf.

[@LemonChieff]

It's slideware but yeah… Guess it's an oversight. It happens.

[@milan_shah]

0:15 could someone please share the feedback site? I can't see it in the description. Thank you!

[@SamWhitlock]

I think this was just for the conference attendees

[@kamilziemian995]

11:35 As person whoes learn lambdas in Lisp, when I hear something like "Lambda is conceptualy like instance of the class" I cringe.

[@JohnWasinger]

18:04 Many redundant shorthands

[@pruibiebehastoet1914]

At 39:00, you mention [this,&] and [this,=], but it does not compile on a recent gcc compiler (11)

[@animetexture7564]

well that's expected

[@jeffreyli1871]

the puzzle is not correct，g value is 11 all along

[@kamilziemian995]

I enjoyed Arthur O'Dwyer's talk, but I think lamdas design in C++ is mediocre at best.

[@kamilziemian995]

This talk is great, but lambdas notation in C++ is awful. For me it is such a big step back from the Lisp family.

[@zzzXopHeTzzz]

Great talk!

[@huang2004]

great talk! Thanks!