* elixir Podcast

* fix
Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* DS Podcast

* secure

* fix
Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* Css Podcast

* fix
Co-authored-by: Nsarit <sarit.pinhas@duda.co>

Co-authored-by: Nsarit <sarit.pinhas@duda.co>

* add Deno book to free-programming-books-zh

* try to fix

Incorrect number of blank lines between last section and next heading  blank-lines

* add author of Deno进阶开发笔记

* update file

added best data science learning tutorial

* update file

* update file

adding most popular deep learning playlist

* update file

* update file

* update file

* Update free-courses-th.md

Add free Python course

* Update free-courses-th.md
Co-authored-by: NSeth <seth@elypia.org>
Co-authored-by: NSeth <seth@elypia.org>

* add link to cheatsheets

* fix ordering in courses-id

* Added git, CSS, HTML, and JS cheatsheets

* Update formatting and added to Table of Contents
Co-authored-by: Neric <eric@hellman.net>

* Update problem-sets-competitive-programming.md

Added Practice Python to Problem Sets

* Update problem-sets-competitive-programming.md

* Added 1 C book and 3 authors.

C
Added 1 new book and 3 missing authors in the list.

* Added a bunch of authors.

C++

* C#

Added an author.

* Added 2 HTML books and 1 format.

* Ordering Change.

* Another One.

* Adds Building Secure & Reliable Systems

* Adds (PDF) mark

* Moves (PDF) mark to after the author

* Added a podcast and an spanish resource

* fixed order and URL

Added R programming resource for program evaluation - Summary and Analysis of Extension Program Evaluation in R (#4794)

check_urls=free-programming-books.md

* feat: add free Vue courses in Thai

* fix: rearrange order

* feat: update to playlist and rearrange order

* Add "Introduction to Reinforcement Learning"

Add "Introduction to Reinforcement Learning" / David Silver

* Update free-courses-en.md
Co-authored-by: NSeth <seth@elypia.org>
Co-authored-by: NSeth <seth@elypia.org>

* add Deno tutorial

* fix: no-url-trailing-slash

* Added cheat sheet refence to swift and c#

* Modified section from PR feedback

* Added free bash shell in Vietnamese

* Fixed lint

* Update free-programming-books-id.md

* Update free-programming-books-id.md
Co-authored-by: NSeth <seth@elypia.org>

* Update free-programming-books-id.md

* Update free-programming-books-id.md

* Update free-programming-books-id.md

* Update free-programming-books-id.md
Co-authored-by: NSeth <seth@elypia.org>

* Added Python Regex Cheatsheet

* Added MySQL cheatsheet

* Added PostgreSQL cheatsheet

* Added SQL heading

* Fixed alphabetical order

* Fixed alphabetial ordering error

* Added Electron.js to free-programming-books-zh

* Rename resource and added provider

* Added Flask Documentation

* Update free-programming-books.md
Co-authored-by: NSeth <seth@elypia.org>
Co-authored-by: NSeth <seth@elypia.org>

* * Updated Django section
- Added link to Django Documentation, version 3.1, in brazilian portuguese

* * Removed version specification in the link and change the suggestion to alphabetical order

* free-programming-cheatsheets.md

I have used both of these links during College and they have saved me from hours of searching for help, just by going too these websites.

* Update free-programming-cheatsheets.md

* Update free-courses-en.md

* Update free-courses-en.md

Added MDN Django tutorial:  https://developer.mozilla.org/en-US/docs/Learn/Server-side/Django

* Create CONTRIBUTING-fa_IR.md

* Fix Incorrect number of blank lines

* fix "Marker style should be `*`"

for passing Travis-CI build

* add CONTRIBUTING-fa_IR link

* add CONTRIBUTING-fa_IR link

* add CONTRIBUTING-fa_IR link

* Add beginner youtube tutorial by freecodeCamp

* Add two kotlin courses

* Update format convention - fix author credit

* Update free-courses-en.md
Co-authored-by: NSeth <seth@elypia.org>

* Move existing course from android to kotlin section
Co-authored-by: NSeth <seth@elypia.org>

* [Introdução a Algoritmos e Programação](http://www.ferrari.pro.br/home/documents/FFerrari-CCechinel-Introducao-a-algoritmos.pdf) - Fabricio Ferrari e Cristian Cechinel (PDF)