Understanding C++ Vector (Dynamic Arrays)

[@abbasio]

Thanks for this video! I'm currently taking your C++ 2D Game Engine course, and took this detour to better understand the Vector class, since I'm coming from a web development background where everything is much more abstracted. I made an insert implementation as follow: void Insert(int index, T value){ //Handle the case where we're already at the max size before inserting if(size == capacity){ T* newArray = new T[capacity * 2]; for (int i = 0; i < size; i++){ newArray[i] = elements[i]; } delete[] elements; elements = newArray; capacity *= 2; } //Increase the size by 1 size++; //Loop over the array in reverse, setting each value equal to the one before, stopping at the given index for(int i = size - 1; i >= index; i--){ elements[i + 1] = elements[i]; } //Replace the given index with the given value elements[index] = value; } It's basic and there might be some edge cases I overlooked, but it seems to work from my testing.

[@ayoubelmhamdi7920]

this is one of best c/cpp vectors tutorial

[@phlimma]

One more follower. I came through @Akitando channel. Very nice explanation.

[@pikuma]

Welcome aboard! Abraços!!! :)

[@phlimma]

@@pikuma and please accept Akita's defy to choose 3 linux distros. ;-)

[@masabh]

I really should've found your youtube channel earlier. I'm doing your assembly language course on udemy too. You are a very good teacher.

[@Luard-xq3zd]

I recently started learning about vectors and I found this vid really helpful

[@achyuththouta6957]

Wow your knowledge about this is so deep. I'm trying to develop my skill and knowledge in programming as I'm a beginner in it. I've started C++ because some people said it's the hardest to learn so I thought why not? I like learning hard stuff but theres way too much in C++

[@fabianrr]

Eso es lo que le falta a tu canal de KZbin, algo desde lo básico y de ahí pasar a tus cursos

[@arturmg2068]

i cant belive your channel just have 10k subscribers, your videos are so good!!

[@TheJGAdams]

I love how you kept the memories of the classic retro games alive. Good stuff! :) So, vector and C++ can work for console like NES? If so, that's really cool!

[@pikuma]

There are many homebrew games developed in C.

[@gammyhorse]

Every single one of your videos is awesome. Thank you!

[@jackgame8841]

37:28 in lines 23 why it had a lot of const? first const and last const?

[@DevSlowz]

Great content as always. Keep up the great work... ps your paid courses are amazing!

[@Miura-Anjin]

Thanks a lot. It makes sense now. What do you suggest me if I decide to my own implement of stack and queue?

[@graemereed1951]

Great video. Do you know how to implement a vector class in C++ like that used in Tradestation's EasyLanguage which can accommodate multiple data types within the same vector?

[@starc0w]

Dear Professor Pezzi Thanks for the video! Very well explained! If I wanted to do something like this in C. What do I have to pay attention to, besides checking whether there is enough memory (malloc). Are there things that I absolutely have to do? (You talked about the whole thing not being so trivial).

[@pikuma]

Good question! We have to use a similar idea, but allocate using malloc(), reallocating/doubling size when necessary using realloc(), and freeing resources with free(). To achieve some sort of "generic" type handling with your dynamic array (for example, being able to create and manipulate different types), we could take advantage of void* and use macros to resolve the type dynamically at compile time. Thse repos are good examples of a simple dynamic array implementation in C99 using the ideas I mentioned above. github.com/eignnx/dynarray github.com/gustavopezzi/dynamicarray

[@starc0w]

@@pikuma Very good, thanks for the advice and sources. I'll be happy to look at that!

[@dmitrysavkin5981]

What about, if T doesn't have constructor? new T[2 * n] throws errror

[@scalevids4457]

Really informative and the best in class. Anyone who want to learn must visit here. Although I had a question why regarding operator = while checking the size of rhs to our size, it should be our capacity for optimal usage. But yes that we can look and optimise anyways.

[@therealherbzy]

Great video!

[@preoalex8298]

What font are you using in your IDE

[@dudu88games]

Ótima explicação, parabéns!

[@arturmg2068]

maravilhoso!

[@starc0w]

Great! Thank you Gustavo!

[@baixodedata2802]

tu é lindão em ..... vim pelo akita

[@pikuma]

Grande Akita! :) Abração e obrigado pelo comment.

[@AQFearfullMage]

Thank you, this is very useful.

[@wakeupneo101]

Parabéns xirú. Não conhecia teu canal, acabei chegando aqui pelo Akita. Muito bom. Inscrito e fortalecendo a comunidade.

[@pikuma]

Opa James, obrigado! Um grande quebra costela. 🙂

[@pablouesc]

Vim pelo Akita! Já inscrito no canal!

[@pikuma]

Grande Pablo! Abraços.

[@SachinHiremath-kw2rw]

Nice explaination

[@DanielTolentino42]

Awsome! Do you have the dotfiles of your vi setup that you can share? Thanks

[@ticiusarakan]

а зачем float? например 320х240 разрешение предполагает что нам не нужны знаки после запятой. или я что то недопонял?

[@uanbu6539]

Hi Gustavo, do you have a video about socket programming using c++?

[@Dannnneh]

The title made me think this would be an in-depth look at the machinations of how the standard library's vector _really_ works, but this is a very basic introduction. Your element-removals do not even call any potential destructor :/

[@desossandoTI]

Very good !!! thanks!

[@AurelianBuia]

what font do you use?

[@pikuma]

IBM's Code Page 437

[@AurelianBuia]

@@pikuma thank you!!

[@danilonascimento3545]

vim pelo akita, gostei muito do canal parabéns.

[@pikuma]

Grande Danilo! Obrigado.

[@katrielaraujo5090]

Seu canal parece muito legal o Akita indicou e estou gostando

[@abrorabyyu6221]

this person is cool af

[@lucassamuel6069]

I'm sure your first language is portuguese, are you brazilian?

[@pikuma]

yes

[@lucassamuel6069]

@@pikuma Cool, I know you didn't ask, but I'm studying Computer Engineering at UTFPR in Paraná-BR

[@pikuma]

@@lucassamuel6069 Haha. Que legal. Eu tenho vários amigos por lá. Sou do RS. 🙂

[@leandrocastro1291]

Gustavo, tenho uns cursos seus na Udemy e fiquei desconfiado quando vi um chimarrao em uma das aulas haha. Vc é fera, ensina muito bem.

[@mateivoican]

void Insert(int index, T value){ if (size == capacity){ T* newarr = new T[capacity*2]; for (int i = 0; i index; i--) { elements[i] = elements[i-1]; } elements[index] = value; size++; }

[@antoinedevldn]

The internet needs to know what you are drinking in this crazy glass!

[@Felipekimst]

chimarrão

[@pikuma]

Claaaaro! ❤️🙂🇧🇷

[@dghung2854]

bro use typewriter for coding 💀

[@nickvatanshenas9251]

Great video!