freeCodeCamp/docs/moderator-handbook.md

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The official freeCodeCamp Moderator Handbook.

This will help you moderate different places in our community, including:

  • GitHub issues & pull requests
  • The forum, chat rooms, Facebook groups, and other online meeting places
  • In-person events like study groups, hackathons, and conferences

All freeCodeCamp Moderators are community-wide moderators. That means that we trust you to oversee any of these places.

This said, you can serve as a moderator in whichever places are of the most interest to you. Some moderators just help out on GitHub. Others just help out on the forum. Some moderators are active everywhere.

The bottom line is that we want you to enjoy being a moderator, and invest your scarce time in places that are of interest to you.

[!NOTE] "With great power comes great responsibility." - Uncle Ben

As a moderator, temperament is more important than technical skill.

Listen. Be Helpful. Don't abuse your power.

freeCodeCamp is an inclusive community, and we need to keep it that way.

We have a single code of conduct that governs our entire community. The fewer the rules, the easier they are to remember. You can read those rules and commit them to memory here.

Moderating GitHub

Moderators have the ability to close issues and accept or close pull requests.

Moderators have two primary responsibilities regarding GitHub:

  1. QA'ing and merging pull requests
  2. Evaluating and responding to issues

Moderating Pull Requests

Pull Requests (PRs) are how contributors submit changes to freeCodeCamp's repository. It's important that we perform Quality Assurance (QA) on pull requests before we decide whether to merge them or close them.

Types of Pull Requests

  1. Challenge Instruction Edits These are changes to the text of challenges - the Description, Instructions, or Test Text. You can also review these right on GitHub and decide whether to merge them. We need to be a bit more careful about these, because millions of people will encounter this text as they work through the freeCodeCamp curriculum. Does the pull request make the text more clear without making it much longer? Are the edits relevant and not overly pedantic? Remember that our goal is for challenges to be as clear and as short as possible. They aren't the place for obscure details. Also, contributors may try to add links to resources to the challenges. You can close these pull requests and reply to them with this:
Thank you for your pull request.
 
We are closing this pull request. Please add links and other details to the challenge's corresponding guide article instead.
 
If you think we're wrong in closing this issue, please request for it to be reopened and add further clarification. Thank you, and happy coding.
  1. Challenge Code Edits These are changes to the code in a challenge - the Challenge Seed, Challenge Solution, and Test Strings. These pull requests need to be pulled down from GitHub and tested on your local computer to make sure the challenge tests can still be passed with the current solution, and the new code doesn't introduce any errors. Some contributors may try to add additional tests to cover pedantic corner-cases. We need to be careful to not make the challenge too complicated. These challenges and their tests should be as simple and intuitive as possible. Aside from the algorithm challenges and interview prep section, learners should be able to solve each challenge within about 2 minutes.

  2. Codebase Changes These code edits change the functionality of the freeCodeCamp platform itself. Sometimes contributors try to make changes without much explanation, but for code changes we need to make sure there's a genuine need for the change. So these pull requests should reference an existing GitHub issue where the reasons for the change are discussed. Then you can open the pull request on your computer and test them out locally. After you've done so, if the changes look good, don't merge them quite yet. You can comment on the pull request saying "LGTM", then mention @raisedadead so he can take a final look.

How to merge or close pull requests

First of all, when you choose a pull request to QA, you should assign yourself to it. You can do this by clicking the "assign yourself" link below the "assignees" part on the right hand column of GitHub's interface.

Depending on the type of pull request it is, follow the corresponding rules listed above.

Before merging any pull request, make sure that GitHub has green checkmarks for everything. If there are any X's, investigate them first and figure out how to get them turned into green checkmarks first.

Sometimes there will be a Merge Conflict. This means that another pull request has made a change to that exact same part of that same file. GitHub has a tool for addressing these merge conflicts right on GitHub. You can try to address these conflicts. Just use your best judgement. The pull request's changes will be on top, and the Master branch's changes will be on bottom. Sometimes there will be redundant information in there that can be deleted. Before you finish, be sure to delete the <<<<<<, ======, and >>>>>> that Git adds to indicate areas of conflict.

If the pull request looks ready to merge (and doesn't require approval from @raisedadead), you can go ahead and merge it. Be sure to use the default "Squash and Merge" functionality on GitHub. This will squash all the pull requests commits down into a single commit, which makes the Git history much easier to read.

You should then comment on the pull request, thanking the contributor in your own personal way.

If the author of the pull request is a "first time contributor" you should also congratulate them on their first merged pull request to the repository. You can look at the upper right-hand corner of the PR's body to determine a first-time contributor. It will show First-time contributor as shown below:

Copy_edits_for_Java_arrays_article_by_karentobo_%C2%B7_Pull_Request__20615_%C2%B7_freeCodeCamp_freeCodeCamp|690x281

If the pull request doesn't look ready to merge you can politely reply telling the author what they should do to get it ready. Hopefully they will reply and get their pull request closer to ready.

Often, a pull request will be obviously low effort. You can often tell this immediately when the contributor didn't bother checking the checkboxes in the Pull Request Template, or used a generic pull request title like "made changes" or "Update index.md".

There are also situations where the contributor is trying to add a link to their own website, or include a library they themselves created, or has a frivolous edit that doesn't serve to help anyone but themselves.

In both of these situations, you should go ahead and close their pull request and reply with this standard message:

Thank you for opening this pull request.

This is a standard message notifying you that we've reviewed your pull request and have decided not to merge it. We would welcome future pull requests from you.

Thank you and happy coding.

If you need a second opinion on a pull request, go ahead and leave your comments on the pull request, then add the "discussing" label to the pull request.

Moderating GitHub Issues

freeCodeCamp is an active open source project. We get new issues every day, all of which need to be triaged and labeled.

Types of GitHub Issues

  1. Code Help Requests, which people have mistakenly created GitHub issues for. If someone is asking for help, paste the following message, then close the issue.
Thank you for reporting this issue.
 
This is a standard message notifying you that this issue seems to be a request for help. Instead of asking for help here, please click the **"Help"** button on the challenge on freeCodeCamp, which will help you create a question in the right part of the forum. Volunteers on the forum usually respond to questions within a few hours and can help determine if there is an issue with your code or the challenge's tests.

If the forum members determine there is nothing wrong with your code, you can request this issue to be reopened.

Thank you and happy coding.
  1. Bug or Clarification issues Try to reproduce the bug yourself if you can. If not, ask them for the steps to reproduce the bug, and whether they have any screenshots, videos, or additional details that can help you reproduce the issue. Once you can reproduce the issue - or at least confirm it's a legit issue - label it confirmed. Then:
  • If it's a simple change to an existing challenge, label as first timers only, otherwise label as help wanted. Use other labels as appropriate.
  • If the issue is more significant, flag as bug.   If there is any ambiguity as to the proper course of action on an issue, feel free to tag @raisedadead on the issue get his opinion on it, then add the Discussing label.
  1. Duplicate Issues If an issue is the same as another reported issue, the prior reported issue should take precedence. Flag as Duplicate, paste the following message replacing #XXXXX with the issue number, then close the issue.
Thank you for reporting this issue.

This is a standard message notifying you that this issue appears to be very similar to issue #XXXXX, so we are closing it as a duplicate.

If you think we're wrong in closing this issue, please request for it to be reopened and add further clarification. Thank you and happy coding.
  1. Fixed in staging Some problems may have already been fixed in staging, but don't have a GitHub issue associated with them. If this is the case, you can paste the following message, close the issue, and add a status: resolved/shipping label:
Thank you for reporting this issue.

This is a standard message notifying you that the problem you mentioned here is present in production, but that it has already been fixed in staging. This means that the next time we push our staging branch to production, this problem should be fixed. Because of this, we're closing this issue.

If you think we're wrong in closing this issue, please request for it to be reopened and add further clarification. Thank you and happy coding.

Closing Stale, Outdated, Inactive Issues and Pull Requests

  • Stale Issues or PRs are those that have not seen any activity from the OP for 21 days (3 weeks from the last activity), but only after a moderator has requested more information/changes. These can be closed in an automated/bot script or by the moderators themselves.

  • Activity is defined as: Comments requesting an update on the PR and triages like status: update needed label etc.

  • If the OP asks for additional assistance or even time, the above can be relaxed and revisited after a response is given. In any case the mods should use their best judgement to resolve the outstanding PR's status.

Other guidelines for Moderators on GitHub

Though you will have write access to freeCodeCamp's repository, you should never push code directly to freeCodeCamp repositories. All code should enter freeCodeCamp's codebase in the form of a pull request from a fork of the repository.

Also, you should never accept your own PRs. They must be QA'd by another moderator, just like with any other PR.

If you notice anyone breaking the code of conduct on GitHub issues, or opening pull requests with malicious content or code, email dev@freecodecamp.org with a link to the offending pull request and we can consider banning them from freeCodeCamp's GitHub organization entirely.

Moderating the Forum

As a Moderator, you help keep our community an enjoyable place for anyone to learn and get help. You will deal with flagged posts and handle spam, off-topic, and other inappropriate conversations.

Note that once you are a moderator on the forum, you will start to see blue moderator hints about forum members, like "this is the first time [person] has posted - let's welcome them to the community!" or "[person] hasn't posted in a long time - let's welcome them back."

A blue text message saying "this is the first time [person] has posted - let's welcome them to the community!

These are opportunities for you to welcome them and make them feel extra special. You never know which person who's marginally involved may become our next super-helper, helping many other people in their coding journey. Even the smallest kindness may trigger a cascade of good deeds.

Deleting forum posts

Forum moderators have the ability to delete user's posts. You should only do this for the following instances:

  1. Someone has posted a pornographic or graphically violent image.
  2. Someone has posted a link or code that is malicious in nature, and could harm other campers who click on it.
  3. Someone has flooded a thread with lots of spam messages.

Dealing with spam

For the first spam post of a user, send them a message explaining the problem, and remove the link or post as appropriate. Leave a note on the user's profile explaining the action you have taken. If the problem persists, then follow the process above. Quietly block the user from posting (using the silence option on the User Admin panel), then send a warning with the Code of Conduct. Check the box in the private message indicating that your message is a "formal warning."

You can ask questions and report incidents in the in the staff forum section.

Dealing with off-topic conversations

Posts or topics that seems to be in the wrong place can be re-categorized or renamed to whatever would be appropriate.

In exceptional circumstances, it may be appropriate for a moderator to fork a discussion into multiple threads.

Again, if you have any problems or questions, make a post with your actions in the Staff category, and tag another moderator if you want them to review your moderating actions.

Underage Users

Our Terms of Service require that freeCodeCamp users be at least 13 years of age. In the event that a user reveals that they are under the age of 13, send them the below message and delete their forum account (if deletion is not available, suspending the account is sufficient). Then email Quincy (quincy@freecodecamp.org) or Mrugesh (mrugesh@freecodecamp.org) to delete the user's freeCodeCamp account as well.

SUBJECT: Users under 13 are not allowed to use the forum per Terms of Service

It has come to our attention that you are under 13 years of age. Per the [freeCodeCamp terms of service](https://www.freecodecamp.org/news/terms-of-service), you must be at least 13 years old to use the site or the forum. We will be deleting both your freeCodeCamp account and your forum account. This restriction keeps us in compliance with United States laws.

Please rejoin once you have reached at least 13 years of age.

Thank you for understanding.

Moderating Facebook

If you see anything that seems to break our Code of Conduct, you should delete it immediately.

Sometimes people will post things that they think are funny. They don't realize that what they said or what they shared could be interpreted as offensive. In these cases, their post should be deleted, but the person who posted it doesn't necessarily need to be banned. By getting their post deleted, they will hopefully come to understand that what they posted was inappropriate.

But if it is an egregious offense that can't reasonably be attributed to a cultural difference or a misunderstanding of the English language, then you should strongly consider blocking the member from the Facebook group.

Moderating Discord

Here's how moderators deal with violations of our Code of Conduct on Discord:

  1. Make sure it was intended to violate the Code of Conduct. Not all violations of the CoC were intended as such. A new camper might post a large amount of code for help, unaware that this can be considered spamming. In these cases, you can just ask them to paste their code with services like Codepen or Pastebin.

  2. If the camper clearly and intentionally violates the Code of Conduct, the moderator will proceed as follows:

  • Ban the offending person from the Discord Server. In order to ban someone, right click on their username/profile picture and select "Ban username". You will be given the option to delete their previous messages - select "Don't delete any", as the messages should remain present as a historic record.
  • Report a short summary of the event in the #mod-log channel. Here's an example of what such a summary might look like:
Banned: _@username_
Reason(s): _Spamming, trolling_
Evidence: _One or more links to the offending message(s)_
  • If you decide to ban someone, it means they're unwilling to abide to our Code of Conduct. Therefore unbanning a Camper should rarely occur. However, if the need arises, you can do so by clicking on the server name, choosing "Server Settings", choosing "Bans", selecting the user you wish to unban, and clicking "Revoke Ban".

Discord Bans are global - you cannot ban a user from a specific channel, only from the entire server.

  1. Creating a Private Discussion

There may be situations where you need to address a concern with a camper privately. This should not be done through DMs, as this can lead to situations where you claim one thing and the camper claims another. Instead, use the bot's functionality to create a private discussion:

  • Call the !fCC moderate private @username command, where @username is the Discord mention of the user. If you are calling this command from a private channel (such as #mod-chat), you will need to parse the mention manually: Ensure you have Developer Mode turned on in your Discord settings, then right click on the user's avatar and select Copy ID. Replace the @username parameter with <@!ID>, where ID is the value you copied earlier. The result should look like: !fCC moderate private <@!465650873650118659>.
  • The bot will create a new channel under the private category and add the @username-mentioned camper and all moderators with the Your Friendly Moderator role. While all moderators are added to the channel for transparency, the moderator who calls this command should be the only one to interact with the camper unless they request assistance.
  • When the conversation is complete, call the !fCC moderate close command in the private channel to have the bot close and delete that channel.
  1. Deleting messages Moderators have the ability to delete messages on Discord. They should only exercise this ability in four very specific situations:
  • Someone has posted a pornographic or graphically violent image.
  • Someone has posted a link or code that is malicious in nature, and could harm other campers who click on it.
  • Someone has flooded the chat with lots of spam messages to such an extreme extent (usually involving bots) as to render chat completely unusable.
  • Someone has posted advertisement and / or a self-promoting message / image (social media).

In all other situations - even situations where the code of conduct is violated - Moderators should not delete the message as these are an important historic record. When you do delete a message, make sure you take a screenshot of it first! The screenshot can be logged in the #mod-log channel, but for the #activity-log it is sufficient to say the evidence was "removed due to sensitive content". Note: If the message contains material that would be illegal to take a screenshot of, copy the message link instead - provide that message link to @raisedadead to forward to Discord's Trust and Safety team.

  1. Dont use @everyone or @here Dont use @everyone or @here under any circumstances! Every single person in that chat room will get a notification. In some cases, tens of thousands of people. Instead, if you want people to see an announcement, you can pin it to the channel to allow everyone to read it.

  2. Dont threaten to ban If a camper is breaking the code of conduct, dont threaten to ban them, and never warn them in public. Instead, talk to them privately using the bot's private command. No one else in that channel needs to know that you banned / suspended the person - campers can view the summary in the #activity-log channel if they want to keep up on that information. If a violation was clearly unintended and doesn't warrant a suspension or private conversation, make the offending camper aware of his / her actions without making it come across as a warning. For example:

  • Camper posts a wall of code to request help

    Moderator: @username Please use Codepen or Pastebin when posting large amounts of code.

  • Or if you really have to explain why:

    Moderator: @username Please use Codepen or Pastebin when posting large amounts of code, because it disrupts the chat for everyone and could be considered spamming according to our Code of Conduct.

  • For mild and unintentional violations of the code of conduct

    Moderator: This is a friendly reminder for everyone to follow the code of conduct: https://code-of-conduct.freecodecamp.org/

  1. Dont brag about being a moderator Do not see yourself as above the community. You are the community. And the community has trusted you to help protect something rare that we all share - a welcoming place for new developers. If you brag about being a moderator, people may feel uneasy around you, in the same way that people may feel uneasy around a police officer, even if theyre doing nothing wrong. This is just human nature.

  2. Dont contradict other moderators If you disagree with the action of a moderator, talk with them in private or bring it up in the #mod-chat channel. Never override a ban, and never contradict the other moderator(s) publicly. Instead, have a cool-headed discussion in mod-chat and convince the moderator that they themselves should reverse their ban or change their point of view. Remember: were all on the same team. We want to dignify the role of moderators and present a unified front.

  3. Talk with other moderators We have a room for moderators only. Use it! If you feel uncomfortable with how to handle a certain situation, ask other moderators for help. If you think something should be discussed, do it. You're part of the team and we value the input of every team member! Even if you totally disagree with anything in these guidelines or the Code of Conduct!

  4. Temporarily inactive If you're not going to be active as a Moderator for a while due to vacation, illness or any other reason, make sure to let the others know in the #mod-chat channel. This is so we know if we can count on you to be regularly active in the server or not.

Moderating our Chat Server

Moderating the chat server is very similar to moderating the Discord server, but there are a few key differences:

  1. No Ban functionality At this time, Rocket.Chat does not have a flow for banning users. Users can be muted (so they are prevented from chatting in a room) or kicked from a room.
  2. Modified Bot Commands The moderation bot in the chat server was developed with a smoother UX in mind. Some of the commands have been modified. Use the !fCC modHelp command to view the available functionality. Bot commands in the chat server do NOT require a user mention as they do with Discord.
  3. No Role Mentions Unlike Discord, Rocket.Chat does not allow you to mention all users by a specific role - this means you cannot ping all moderators at once.

How to become a moderator

If you are helping people in the community consistently over time, our Moderator Team will eventually take notice, and one of them will mention you as a possible moderator to our staff. There are no shortcuts to becoming a moderator.

If you are approved, we will add you to our Moderator Teams on GitHub, forum, etc.

[!NOTE] > For GitHub: After you've been accepted as a moderator, you will receive a Github repository invitation. You'll need to head over towards freeCodeCamp GitHub Organisation Invitation to be able to accept the invitation. This is required for us to be able to give you write access on some of our repositories.

How we retire inactive moderators

Please note that we will frequently remove mods whom we think are inactive. When we do this we will send the following message:

This is a standard message notifying you that, since you don't seem to have been an active moderator recently, we're removing you from our Moderator team. We deeply appreciate your help in the past.

If you think we did this in error, or once you're ready to come back and contribute more, just reply to this message letting me know.

How our Contributors room works

Anyone is welcome in the Contributors room on our chat server. It is the designated chat room for moderators and other campers who are contributing to our community in any number of ways, including through study groups.

Our assumption is that contributors will read anything in this room that directly mentions them with an @username. Everything else is optional. But feel free to read anything anyone posts in there and interact.

Dealing with solicitors

You may be approached by organizations who want to partner or co-brand with freeCodeCamp in some way. Once you realize that this is what they're after, please stop talking to them and tell them to email quincy@freecodecamp.org. He gets proposals like this all the time and is in the best position to judge whether such a relationship will be worth it for our community (and it rarely is).

Dealing with (mental) health inquiries

You may come across situations where users are seeking medical advice or are dealing with mental health issues and are looking for support. As a matter of policy, you should avoid talking privately about these matters. Should the situation at some point reflect back to fCC, we want to have the conversation(s) on record. Make it clear that we are not medical professionals and that you encourage the user to find professional help. As difficult as it sometimes can be, avoid giving any tips or advice other than pointing the user in the direction of professional help!

If this happens on Discord: Create a private channel for the user and the mod team. This can be done with the bot's private command.

  • The user is guaranteed some privacy
  • Public chat is no longer disrupted
  • Other team members can pitch in, should you be uncomfortable dealing with the situation yourself

If you believe the user is capable of rejoining the community, right click on the private channel and copy the ID. Put the following message in #mod-log:

Reference medical advice: <channel ID> <username>

Helpful URLs:

http://www.suicide.org/international-suicide-hotlines.html

A note on free speech

Sometimes people will defend something offensive or incendiary that they said as "free speech."

This XKCD comic perfectly summarizes most communities' thoughts on free speech. So if someone defends something they're saying as "free speech" feel free to send it to them.

Thanks for reading this, and thanks for helping the developer community!

Reply Templates

These are some of the standard reply templates that you may use while reviewing pull requests and triaging issues.

You can make your own with GitHub's built-in Saved replies feature or use the ones below.

Thank you

Thank you for your contribution to the page! 👍
We are happy to accept these changes and look forward to future contributions. 🎉

Thank you and congrats

For thanking and encouraging first-time contributors.

Hi @username. Congrats on your first pull request (PR)! 🎉

Thank you for your contribution to the page! 👍
We are happy to accept these changes and look forward to future contributions. 📝

Build Error

Hey @username

We would love to be able to merge your changes but it looks like there is an error with the CI build. ⚠️

Once you resolve these issues, We will be able to review your PR and merge it. 😊

---

Feel free to reference the [contributing guidelines](https://contribute.freecodecamp.org/#/how-to-work-on-coding-challenges?id=testing-challenges) for instructions on running the CI build locally. ✅

Syncing Fork

When PR is not up to date with the master branch.

Hey @username

We would love to be able to merge your changes but it looks like the branch is not up to date. ⚠️

To resolve this error, you will have to sync the latest changes from the `master` branch of the `freeCodeCamp/freeCodeCamp` repo.

Using the command line, you can do this in three easy steps:

```bash
git remote add upstream git://github.com/freeCodeCamp/freeCodeCamp.git

git fetch upstream

git pull upstream master
```

If you're using a GUI, you can simply `Add a new remote...` and use the link `git://github.com/freeCodeCamp/freeCodeCamp.git` from above.

Once you sync your fork and pass the build, we will be able to review your PR and merge it. 😊

---

Feel free to reference the [Syncing a Fork](https://help.github.com/articles/syncing-a-fork/) article on GitHub for more insight on how to keep your fork up-to-date with the upstream repository. 🔄

Merge Conflicts

When PR has merge conflicts that need to be resolved.¹

Hey @username

We would love to be able to merge your changes but it looks like you have some merge conflicts. ⚠️

Once you resolve these conflicts, We will be able to review your PR and merge it. 😊

---

If you're not familiar with the merge conflict process, feel free to look over GitHub's guide on ["Resolving a merge conflict"](https://help.github.com/articles/resolving-a-merge-conflict-on-github/). 🔍️

Also, it's good practice on GitHub to write a brief description of your changes when creating a PR. 📝

¹ If a first-time-contributor has a merge conflict, maintainers will resolve the conflict for them.

Duplicate

When PR is repetitive or a duplicate.

Hey @username

This PR seems to make similar changes as the existing PR <#number>. As such, we are going to close this as duplicate.

If you feel you have additional changes to expand upon this PR, please feel free to push your commits and request this PR be reopened.

Thanks again! 😊

---

If you have any questions, feel free to ask questions on the ['Contributors' category on our forum](https://forum.freecodecamp.org/c/contributors) or [the contributors chat room](https://chat.freecodecamp.org/contributors).

Closing invalid pull requests

When PR is invalid.

Hey @username

Thank you for opening this pull request.

This is a standard message notifying you that we've reviewed your pull request and have decided not to merge it. We would welcome future pull requests from you.

Thank you and happy coding.

When PR adds links to external resources.

Thank you for your pull request.

We are closing this pull request. Please suggest links and other details to add the challenge's corresponding guide post through [a forum topic](https://forum.freecodecamp.org/new-topic?category=Contributors&title=&body=**What%20is%20your%20hint%20or%20solution%20suggestion%3F**%0A%0A%0A%0A%0A**Challenge%3A**%0A%0A%0A**Link%20to%20the%20challenge%3A**) instead.

If you think we're wrong in closing this issue, please request for it to be reopened and add further clarification. Thank you, and happy coding.

Closing Invalid Issues

When an issue relates to the camper's code.

Thank you for reporting this issue.

This is a standard message notifying you that this issue seems to be a request for help. Instead of asking for help here, please click the **"Get Help"** button on the challenge on freeCodeCamp and choose the **"Ask for help"** option, which will help you create a question in the right part of the forum. Volunteers on the forum usually respond to questions within a few hours and can help determine if there is an issue with your code or the challenge's tests.

If the forum members determine there is nothing wrong with your code, you can request this issue to be reopened.

Thank you and happy coding.

When an issue is duplicate of an earlier issue

Thank you for reporting this issue.

This is a standard message notifying you that this issue appears to be very similar to issue #XXXXX, so we are closing it as a duplicate.

If you think we're wrong in closing this issue, please request for it to be reopened and add further clarification. Thank you and happy coding.

When an issue is fixed in staging.

Thank you for reporting this issue.

This is a standard message notifying you that the problem you mentioned here is present in production, but that it has already been fixed in staging. This means that the next time we push our staging branch to production, this problem should be fixed. Because of this, we're closing this issue.

If you think we're wrong in closing this issue, please request for it to be reopened and add further clarification. Thank you and happy coding.