Adding size method of std set.

I found some grammar mistakes in insert.md. I would like to work on this.

I added and tested this function on ideone. admin please review it.

Hello,
We should prefer pre-incrementation (++i, --i ) over post-incrementation ( i++, i-- ) in traditional for loop, until they will make a difference in the result. Pre-incrementation is actually more efficient than post-incrementation as in the post incrementation will need addition copy of the data.

They are pretty common STL Data Structures and quite useful for certain scenarios.

Based on the discussions on issue #36, I'm suggesting that all STL methods/types are prefixed with std::. This should also be reflected in CONTRIBUTING.md.

Describe the bug
In algorithm/for_each_n.md, there is a comment // Will output, 3 2 3 9 which is incorrect. This program will print out "3 2 ".

To Reproduce
Steps to reproduce the behavior:

1. Go to algorithm/for_each_n.md
2. See error

Expected behavior
Comment should read: // Will output, "3 2 "

Compiler (please complete the following information):

• OS: MacOS
• Compiler Version [e.g. gcc 8.2]: Apple LLVM version 10.0.0 (clang-1000.11.45.5)

Additional context
Maybe the example could be changed to something like the one used at cppreference.

Adding std::set.insert( )

The repo serves a fantastic guide to introduce new comers with the standard library of c++. It would be even great if we could add other lesser known( or used ) features of c++ here.

• Suggestions:
  • Object Oriented Programming (not only inheritance, but also interesting topics like method chaining and this pointer)
  • Templates and variadic templates ( quite interesting ) and discussion about issues ( dos and donts ) with using templates with Classes
  • Lambda functions

And more such interesting and rarely features of c++

The Slack join Link has expired and no more working for the newbies to join the team.

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week 1 issue was created.
It is still open.

OPEN ISSUES

💚 #474 contains.md, by EmmaINSA

NOISY ISSUE

🔈 #474 contains.md, by EmmaINSA
It received 1 comments.

PULL REQUESTS

Last week, 1 pull request was created, updated or merged.

UPDATED PULL REQUEST

Last week, 1 pull request was updated.
💛 #474 contains.md, by EmmaINSA

COMMITS

Last week there were no commits.

CONTRIBUTORS

Last week there were no contributors.

STARGAZERS

Last week there were 3 stagazers.
⭐ vinciuna
⭐ carlin314
⭐ EmmaINSA
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

for reference

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week 4 issues were created.
Of these, 0 issues have been closed and 4 issues are still open.

OPEN ISSUES

💚 #467 Explaining the fill_n function, by kbodurri
💚 #466 Algorithms: greatest common divisor, by amroakmal
💚 #465 Created clear.md for unordered_map, by amroakmal
💚 #464 Showing the usage of inner_product(), by kbodurri

NOISY ISSUE

🔈 #464 Showing the usage of inner_product(), by kbodurri
It received 2 comments.

PULL REQUESTS

Last week, 10 pull requests were created, updated or merged.

OPEN PULL REQUEST

Last week, 2 pull requests were opened.
💚 #467 Explaining the fill_n function, by kbodurri
💚 #466 Algorithms: greatest common divisor, by amroakmal

UPDATED PULL REQUEST

Last week, 3 pull requests were updated.
💛 #465 Created clear.md for unordered_map, by amroakmal
💛 #464 Showing the usage of inner_product(), by kbodurri
💛 #447 add partial_sum algorithm, by tiziano-b

MERGED PULL REQUEST

Last week, 5 pull requests were merged.
💜 #453 Added method count for unorderedmap, by ariella879
💜 #450 created set/cend.md and map/rend.md and Fixed makefiles , by Nerouse
💜 #368 Added Queue Constructor as well as updated todo and readme.md, by Ranner198
💜 #353 new is_sorted_until added, by abhay313
💜 #247 Add nth_element() in algorithm , by IanFPFerreira

COMMITS

Last week there were 9 commits.
🛠️ publish new changes by Bhupesh-V
🛠️ Merge pull request #453 from ariella879/mybranch Added method count for unorderedmap by Bhupesh-V
🛠️ Update count.md by Bhupesh-V
🛠️ Merge pull request #450 from Nerouse/master created set/cend.md and map/rend.md and Fixed makefiles by Bhupesh-V
🛠️ Update cend.md by Bhupesh-V
🛠️ Update rend.md by Bhupesh-V
🛠️ Merge pull request #368 from Ranner198/queue Added Queue Constructor as well as updated todo and readme.md by Bhupesh-V
🛠️ Merge pull request #353 from abhay313/patch-5 new is_sorted_until added by Bhupesh-V
🛠️ Merge pull request #247 from IanFPFerreira/nth_element Add nth_element() in algorithm by Bhupesh-V

CONTRIBUTORS

Last week there was 1 contributor.
👤 Bhupesh-V

STARGAZERS

Last week there were 6 stagazers.
⭐ JanSimek
⭐ aryamanpuri
⭐ kbodurri
⭐ beltmankelo
⭐ clbeggs
⭐ JoonSoo-Park
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

Add Runnable links of the code below the example.
Use link name Run Code which links to a Online C++ complier conatining the example code.
Use Rextester as the Online C++ Compiler (If you have a better suggesstion please comment).

Follow below steps to generate the Run Code Link.

1. Go to Rextester
2. Copy or write the example code.
3. Run the code (hit F8) , see if you face any problems
4. Save the code with the followng title format
   <algo_name>_30-Seconds-of-C++
5. A permanent link will be generated , copy that
6. Submit a PR which contains the Run Code Link just below the example.

Comment any doubts, suggesstions.

In GCC, we can directly count set bits using __builtin_popcount(). So we can avoid a separate function for counting set bits.

I have been maintaining this project for a long time now and I think I am not able respond quickly to new PRs thus driving away future contributors.

If you have already contributed to 30 Seconds of C++ before feel free to comment below, if you are willing to be a potential maintainer and collaborator.

The goal of 30C++ is to make sure C++ is easier to learn by providing quick explanations of STL, while driving the beginner friendly OpenSource Contribution

Describe the bug
The current build for this repository is failing because of the command "-std=c++2a " found in the make files. I believe that this c++ version is not supported yet by Travis CI.

This is the makefile for set and the other makefiles yield a similar result

Screenshots

Compiler (please complete the following information):

• OS: Mac OS

I would like to add std::set.begin( ) here

Develop a weekly newsletter for sending random code snippets to subscribers.

https://app.leanboard.io/board/a7721e60-20e7-4352-b365-8bc725ed7c2a

I would like to add set.end( ) here

template 1.pdf
how is this for a template for the newsletter ?

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Compiler (please complete the following information):

• OS: [e.g. iOS]
• Compiler Version [e.g. gcc 8.2]

Additional context
Add any other context about the problem here.

Can I work on implementing the reverse_copy method for algorithm? Please confirm.
In the meanwhile, I am going to start

There are spelling and grammar mistakes in vector.md (https://github.com/Bhupesh-V/30-seconds-of-cpp/blob/master/vector/vector.md). I will work on them!

How about adding time complexity to the methods presented?

This is for first-time-contributors :
Add functions which belong to a particular header file in its corresponding .md file inside the header folder.
For example
std::sort belongs to algorithm header file, so make a new file sort.md inside the algorithm directory while maintaining the CONTIBUTING guidelines and formats.

See todo.txt file in different header directory to see which of the methods have not been implemented yet.

Add Time Complexities of all methods for all functions / algorithms.
If Time Complexities of all methods will also be available handy, it'll make the repo more useful.

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week, no issues were created.

PULL REQUESTS

Last week, no pull requests were created, updated or merged.

COMMITS

Last week there were no commits.

CONTRIBUTORS

Last week there were no contributors.

STARGAZERS

Last week there were 7 stagazers.
⭐ ivantux1
⭐ kevin95269
⭐ GrantorShadow
⭐ maheshoz
⭐ mfurkanuslu
⭐ crazyguitar
⭐ fxrcode
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week, no issues were created.

PULL REQUESTS

Last week, no pull requests were created, updated or merged.

COMMITS

Last week there were no commits.

CONTRIBUTORS

Last week there were no contributors.

STARGAZERS

Last week there were 2 stagazers.
⭐ Royzon
⭐ elchangtw
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

The repo doesn't contain any code for reversing a stack. The same has been added in the pull request.
GH-233

Hello. I noticed that for unordered_map there is no method called "count." Could I work on and be assigned this issue? Thank you.

I would like to work with the random library.

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week, no issues were created.

PULL REQUESTS

Last week, no pull requests were created, updated or merged.

COMMITS

Last week there were no commits.

CONTRIBUTORS

Last week there were no contributors.

STARGAZERS

Last week there were 5 stagazers.
⭐ khaind
⭐ Wendy-chang-115
⭐ xygai
⭐ mengguang
⭐ MaggieHu77
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

String class and its corresponding methods should also be included.

Soon we will be implementing/explaining new C++ features. Some of them are included below, you can comment out your suggestions or chat with us on our Discord Server for more info.

We can implement max heap, min-heap. It is used whenever we wish efficiently find the minimum or maximum element.
Can I add this algo?

Adding std::set.empty( )

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week 2 issues were created.
Of these, 0 issues have been closed and 2 issues are still open.

OPEN ISSUES

💚 #470 max_size.cpp, by Cybertron-Avneesh
💚 #469 max_size.md, by Cybertron-Avneesh

PULL REQUESTS

Last week, 2 pull requests were created, updated or merged.

OPEN PULL REQUEST

Last week, 1 pull request was opened.
💚 #469 max_size.md, by Cybertron-Avneesh

UPDATED PULL REQUEST

Last week, 1 pull request was updated.
💛 #470 max_size.cpp, by Cybertron-Avneesh

COMMITS

Last week there were no commits.

CONTRIBUTORS

Last week there were no contributors.

STARGAZERS

Last week there were 10 stagazers.
⭐ TheRealMazur
⭐ hardesh
⭐ James-Silva
⭐ afenotes
⭐ alanwuha
⭐ Cybertron-Avneesh
⭐ JakeRoeleven
⭐ qzyse2017
⭐ Sanchitraina1999
⭐ ngttai
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

Set is one of the most commonly used container in CPP. I would like to add some of the functions of this container. @Bhupesh-V

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week 1 issue was created.
It is still open.

OPEN ISSUES

💚 #477 adding inner_product, by bunnysamurai

PULL REQUESTS

Last week, 7 pull requests were created, updated or merged.

OPEN PULL REQUEST

Last week, 1 pull request was opened.
💚 #477 adding inner_product, by bunnysamurai

UPDATED PULL REQUEST

Last week, 2 pull requests were updated.
💛 #465 Created clear.md for unordered_map, by amroakmal
💛 #462 added destroy.md, by AVC0706

MERGED PULL REQUEST

Last week, 4 pull requests were merged.
💜 #474 contains.md, by EmmaINSA
💜 #470 max_size.cpp, by Cybertron-Avneesh
💜 #469 max_size.md, by Cybertron-Avneesh
💜 #467 Explaining the fill_n function, by kbodurri

COMMITS

Last week there were 4 commits.
🛠️ Merge pull request #474 from EmmaINSA/set-contains contains.md by Bhupesh-V
🛠️ Merge pull request #470 from Cybertron-Avneesh/master max_size.cpp by Bhupesh-V
🛠️ Merge pull request #469 from Cybertron-Avneesh/patch-1 max_size.md by Bhupesh-V
🛠️ Merge pull request #467 from kbodurri/fill_n Explaining the fill_n function by Bhupesh-V

CONTRIBUTORS

Last week there was 1 contributor.
👤 Bhupesh-V

STARGAZERS

Last week there were 2 stagazers.
⭐ bunnysamurai
⭐ kannasoot
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

I would like to work on the max_size method for lists.

On README, the link name for the equal_range.md is incorrect:

<li><a href="algorithm/equal_range.md"><code>lower_bound</code></a></li>
<li><a href="algorithm/lower_bound.md"><code>lower_bound</code></a></li>

What to implement search as it is in the todo list.
Assign it to me if nobody is working.
#Hacktoberfest

Currently I have to run update_readme.py for updating the contents of README after a PR is merged.
We need to automate running of this script.
2 solutions can be:

• Using Webhooks
• GitHub Actions

I think using actions would be a wise choice

I am currently working on a python script which can help to build readme files automatically.
It can be applied as a git hook.
But it would be nice if we build a C++ code instead to build readme(s)

Describe the bug
All of the links in the README files in each of the header file folders are broken.

To Reproduce
Steps to reproduce the behavior:

1. Go to algorithm, list or any of the other header file folders.
2. View contents and try to click on any link
3. They don't do anything

Expected behavior
I expect them to take me to the correct Markdown file. I think your update_readme.py script should also update the READMEs in each of the subfolders.

Here's the Weekly Digest for Bhupesh-V/30-seconds-of-cpp:

ISSUES

Last week, no issues were created.

PULL REQUESTS

Last week, no pull requests were created, updated or merged.

COMMITS

Last week there were no commits.

CONTRIBUTORS

Last week there were no contributors.

STARGAZERS

Last week there were 3 stagazers.
⭐ cyb3rturtle
⭐ krthkj
⭐ luisalves05
You all are the stars! 🌟

RELEASES

Last week there were no releases.

That's all for last week, please 👀 Watch and ⭐ Star the repository Bhupesh-V/30-seconds-of-cpp to receive next weekly updates. 😃

You can also view all Weekly Digests by clicking here.

Your Weekly Digest bot. 📆

Although the explanation for lower_bound (for a set) was added to the repository, no references for it were added.

To Reproduce
Accessing the main README file:

README from "set" folder:

Expected behavior
A reference for the lower_bound file should be shown in these lists.