* improvements to check_urls

make check have a more descriptive name
produce output file instead

* upload artifacts

* a

* change file to trigger test

* put things back

* Updated with refined link

* hope this space works

* Move a playground link to CSS section

FlexBox is a CSS feature.
This move is consistent with other files.

* Fix index in english free-programming-playgrounds

* Move a section according to alphabetical order

* Remove offline link pyfiddle.io

Shutdown confirmed: https://github.com/priyankcommits/pyfiddleio/issues/7

* Addes Javascript & Programming Fundamentals Books

Added Bengali language Javascript and Programming Fundamentals Books

* remove trailing slash on hostname per style guidelines

* alphabetical order
Co-authored-by: NEric Hellman <eric@hellman.net>

I made some orthography fixes

Changes include:
- Remove extra `/` for repo links
- Improve grammar so it flows better
- Make markdown follow standards

* update link for "Modern C" by Jens Gustedt, more authoritative

* same as before, but remove trailing slash for the linter

* added css notes

* Added Git and Nodejs notes

* fix broken urls

* trigger on pull request creation too

* allow certificate verify failed

some sites have misconfigured/expired certs

* adding back two links that were manually verified good

* Added AngularJS Notes

* Fixed the alphabetical order

fixes #3583

* [Update] free-programming-books-ko.md

Add raspberry pi free book link.

* [Update] free-programming-books-ko.md

Add links to raspberry pi free docs and change the spacing between lines.

* Fix the index

* Add Python Book (Arabic)

* Add CSS book (Arabic)

* Add HTML book (Arabic)

* Update ubuntu book’s link

Update ubuntu book’s link with the original source link

* Update UX book’s link

Update UX book’s link with the original source link

* add awesome_bot to check urls

* allow dupes

* make url checking dependent on commit message

* add web.archive.org to whitelist

cuz awesome_bot is having trouble with those links

* fix travis.yaml

* check urls

* need ruby

* another site to avoid

* check urls

* make regex more generic

* sudo deprecated

* make travis linter happy

check url

* try skip results

check url

* timeout was what was killing us

check url

* testing fixing urls

check url

* dont allow timeout

check url

* testing timeout

check url

* put fpb back

check url

* enable to check_urls on arbitrary files

check_urls:free-programming-books.md

* try again

check_urls:free-programming-books.md

* test again

check_urls:free-programming-books.md

* travis doesnt like :

check_urls=free-programming-books.md

* allow arbitrary number of files to be checked

check_urls=free-programming-books.md

* woops forgot to fix the trigger regex

check_urls=free-programming-books.md free-programming-books-en.md

* use for loop instead of xargs

check_urls=free-programming-books.md free-programming-books-en.md

* add documentation

* Link to the official site for Data Munging with Perl

* satisfy linter

* Update free-programming-books.md

* Update free-programming-books.md

* Update free-programming-books-ru.md

* Update free-programming-books-fa_IR.md

* Update free-programming-books-fa_IR.md

* Update free-programming-books.md

* Update free-programming-books.md

The content of book released under the CC BY-NC 4.0.

* Add the OCaml book by Michael R. Clarkson

* Fix the alphabetical order

* Fix 'Reinforcement learning' broken link

Change the old google drive link to the new finished draft for the Reinforcement learning book

* Change url form

* Add Deep Learning with PyTorch

* Add PDF indicator

* Add "Go El Kitabı" to Turkish list

* Add description and put in order

* Update according to the feedback given in PR

* Added Deno resources

Added 2 links to Deno resources

* Added english deno resources under typescript

* Deleted a mistake I put into interactive en tuts

* Update free-programming-books-pt_PT.md

* Update free-programming-books-pt_PT.md

* Update free-programming-books-pt_BR.md

* Update free-programming-books-pt_BR.md

* Add Database Design, 2nd Ed.

* Add format indicator

* You Don't Know JS in potuguese.

You Don't Know JS in potuguese.

* Update free-programming-books-pt_BR.md

* Add index entry for agnostic operating systems topic

* Add Maziero's operating systems book

* Add under construction indicator

This book is an on going work, it's publish under that link, but things
are changed from time to time in it.

* Update free-programming-books-zh.md

* Update free-programming-books-zh.md