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README.md

Introduction to FP in Scala Build Status

This is the base project for the workshop.

note: please test your environment before you arrive so we can get started quickly on the day.

Getting started

Before you attend you will need to get a few things ready and ensure everything is setup properly. sbt is going to do all the heavy lifting though, so hopefully it is all straight forward, if not, send us an email via mark@hibberd.id.au.

Pre-requisites.

  1. A valid install of java 6+
  2. git
  3. if you are windows only install sbt using the msi installer

Getting scala and validating your environment (for unix):

git clone https://github.com/markhibberd/introduction-to-fp-in-scala.git
cd introduction-to-fp-in-scala
./sbt "test:compile"

Getting scala and validating your environment (for windows):

git clone https://github.com/markhibberd/introduction-to-fp-in-scala.git
cd introduction-to-fp-in-scala
sbt "test:compile"

For either platform this may take a few minutes. It will:

  1. Download the sbt build tool.
  2. Download the required versions of scala.
  3. Compile the main and test source code.
  4. Run the tests.

You should see green output, no errors and, an exit code of 0.

Working with scala.

Any good text editor will be sufficient for the course. If you prefer an IDE, you can use the eclipse based scala-ide, intellij, or emacs with ensime. There are commented out lines in project/plugins.sbt that will help you get started:

You can generate project files for intellij with (after uncommenting sbt-idea plugin):

./sbt 'gen-idea no-classifiers'

You can generate project files for eclipse with (after uncommenting sbteclipse-plugin plugin):

./sbt eclipse

If you want to use ensime (after uncommenting ensime-sbt-cmd):

./sbt 'ensime generate'

Just note that if you choose eclipse or intellij, have a backup texteditor as well, because there won't be enough time to debug any editor issues.

The Plan

There is about two weeks worth of material available, people with different backgrounds will progress through at different rates.

Just enough scala

  • src/main/scala/intro/Scala.scala
  • src/main/scala/intro/CheatSheet.scala

What is functional programming?

  • src/main/scala/intro/Intro.scala

Introduction to data structures and higher order functions

Examples

  • src/main/scala/intro/Id.scala
  • src/main/scala/intro/Optional.scala

Exercises

  • Lists - src/main/scala/intro/List.scala
  • Errors without exceptions - src/main/scala/intro/Result.scala

Intro to Type Classes

Example

  • src/main/scala/intro/Equal.scala

Exercises

  • src/main/scala/intro/Functor.scala

Algebra for fun and profit

  • src/main/scala/intro/Monoid.scala

Property based testing

  • Lists: src/test/scala/intro/ListProperties.scala
  • Laws: src/test/scala/intro/MonoidProperties.scala

Parsers

  • src/main/scala/challenge/Parser.scala

Zippers

  • src/main/scala/challenge/Zippers.scala

Lenses

  • src/main/scala/challenge/Lens.scala (TBD)

Patterns in Types

  • src/main/scala/patterns/Reader.scala
  • src/main/scala/patterns/Writer.scala
  • src/main/scala/patterns/State.scala
  • src/main/scala/patterns/Http.scala
  • src/main/scala/patterns/Applicative.scala
  • src/main/scala/patterns/Monad.scala
  • src/main/scala/patterns/ReaderT.scala
  • src/main/scala/patterns/WriterT.scala
  • src/main/scala/patterns/StateT.scala
  • src/main/scala/patterns/MonadTrans.scala
  • src/main/scala/patterns/HttpT.scala

Freedom

  • src/main/scala/challenge/Trampoline.scala (TBD)
  • src/main/scala/challenge/Free.scala (TBD)

Stream Processing

  • src/main/scala/challenge/Streams.scala (TBD)

About

A softer introduction to fp in scala course, based on patterns-in-types and the nicta course.

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