State by itself is quite harmless. However, mutable state is the big offender. Especially if it is shared. What exactly is mutable state? Any state that can change.

====================

Why functional programming?

Nice article and pictures of multicores.

https://sigma.software/about/media/pillars-functional-programming-part-1

=====================

Maven repository  for jars (par collections for example)

https://search.maven.org/search?q=g:org.scala-lang.modules%20a:scala-parser-combinators_2.13

=====================

lectures on scala

https://github.com/scalasummerschool/lectures

=====================

Scala course  at Lund University

https://github.com/lunduniversity/introprog

http://cs.lth.se/pgk/download/

=====================

an argument for pure functions and programming

https://dev.to/pietvandongen/pure-bliss-with-pure-functions-in-java-1mba

=====================

Abstract syntax tree generation

https://stackoverflow.com/questions/10419101/how-can-i-find-the-statements-in-a-scala-program-from-within-a-compiler-plugin

=====================

95 hardest sudoku problems

http://www.dos486.com/sudoku/top95.txt

=====================

code example (bar code decoder)

https://habr.com/en/post/439768/

=====================

online tutorial for scala

https://hub.mybinder.org/user/sbrunk-almond-examples-yw61qxqu/lab

=====================

Scala best practices 

https://nrinaudo.github.io/scala-best-practices/index.html

=====================

codejudge

https://www.codejudge.net/docs/reference

Race Track game

Game of life

===================

https://meta.plasm.us/posts/2013/03/28/better-scala-syntax-highlighting-for-hakyll/

===================

CS quotes

https://henrikwarne.com/2016/04/17/more-good-programming-quotes/

https://henrikwarne.com/2017/09/16/more-good-programming-quotes-part-2/

===================

“To have another language is to possess a second soul.”

― attributed Charlemagne, Emperor of the  Carolingian Empire (Western Europe)

-------------------

FP strongly discourages changing the state of a variable once initialized. This has a profound effect upon concurrency. If you can’t change the state of a variable, you can’t have a race condition. If you can’t update the value of a variable, you can’t have a concurrent update problem.

-------------------

8. Forced Null-Checks

In Java, the method signature of a public method does not tell you if

a returned value can be null or not. Take this signature for instance:

public List<Item> getSelectedItems()

What happens when no item is selected? Does this method then return

null? Or does it return an empty list? We do not know for sure without

looking into the implementation of this method (except we are very

lucky in this case that the signature has a good javadoc description

of the return type). There are two mistakes a developer could possibly

make: (1)fForgetting to check the return value for null when it can be

null, resulting in the famous NullPointerException, or; (2) checking

it for null although it never can be null, resulting in needless code.

why functional programming matters

http://queue.acm.org/detail.cfm?id=2038036

why pure functions

http://www.deadcoderising.com/2017-06-13-why-pure-functions-4-benefits-to-embrace-2/

BufferOverflow

http://seclists.org/oss-sec/2017/q2/344

============

wartremover

https://blog.knoldus.com/2017/06/15/remove-scala-warts-with-wartremover/

=========

Intro Videos

https://www.youtube.com/watch?v=ugHsIj60VfQ (30:00 slide about functions)

https://www.youtube.com/channel/UC1VAdzkoY7M2e3msbW9Ur8w/videos?shelf_id=0&view=0&sort=dd

===============

Scala warts

http://www.lihaoyi.com/post/WartsoftheScalaProgrammingLanguage.html

https://www.reddit.com/r/scala/comments/616n3y/could_anyone_recommend_scala_resources_that/

================

online compiler

https://scalafiddle.io/

http://www.scala-lang.org/blog/2017/05/19/scastie.html

------------------

Book

http://twitter.github.io/effectivescala/

-------------------

Very good explanation of what being functional programming means

https://dotboris.github.io/2017/04/07/functional-programming/

Source of exercises

    http://exercism.io

    https://www.scala-exercises.org/

    http://www.sofiacole.com/technology/adopting-scala-the-next-steps/

https://medium.com/@markcanlasnyc/scala-saturday-functions-for-the-object-oriented-4218f9ed192b#.dw8x8zxvb

--------------------

Map-Reduce in Scala

https://madusudanan.com/blog/scala-tutorials-part-9-intro-to-functional-programming/

--------------------

bash scripting

https://likegeeks.com/bash-script-easy-guide/

https://likegeeks.com/linux-bash-scripting-awesome-guide-part3/

-------------------

collatz

http://codepen.io/benlorantfy/pen/KWzXoX

-------------------

cheat sheets

https://mbonaci.github.io/scala/

http://alvinalexander.com/downloads/scala/Scala-Cheat-Sheet-devdaily.pdf

http://homepage.cs.uiowa.edu/~tinelli/classes/022/Fall13/Notes/scala-quick-reference.pdf

https://www.youtube.com/watch?v=RZEZp8fqn_0

-------------------

scala books

http://underscore.io/training/

-------------------

dependent types in Scala

https://stepik.org/course/ThCS-Introduction-to-programming-with-dependent-types-in-Scala-2294/

--------------------

chess engine in scala

http://marianogappa.github.io/software/2017/03/24/ostinato-a-chess-engine-written-in-scala-that-runs-on-the-browser-docker-and-the-repl/

https://en.lichess.org

---------------------

scala code quality

https://www.reddit.com/r/scala/comments/616n3y/could_anyone_recommend_scala_resources_that/