Copyright © 2017 Fantasyland Institute of Learning. All rights reserved.
A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.
val square : Int => Int = x => x * x
This is my attempt to give Scala newcomers a quick-and-easy rundown to the prerequisite steps they need to a) try Scala, and b) get a standard project up and running on their machine. I'm not going to talk about the language at all; there are plenty of better resources a google search away. This is just focused on the prerequisite tooling and machine setup. I will not be assuming you have any background in JVM languages. So if you're coming from Python, Ruby, JavaScript, Haskell, or anywhere… I hope to present the information you need without assuming anything.
Disclaimer It has been over a decade since I was new to Scala, and when I was new to Scala, I was coming from a Java and Ruby background. This has probably caused me to unknowingly make some assumptions. Please feel free to call me out in comments/tweets!
One assumption I'm knowingly making is that you're on a Unix-like platform. Sorry, Windows users.
| # -*- mode: ruby -*- | |
| # vi: set ft=ruby : | |
| box = 'ubuntu/trusty64' | |
| hostname = 'emberclibox' | |
| domain = 'example.com' | |
| ip = '192.168.42.42' | |
| ram = '512' | |
| $rootScript = <<SCRIPT |
| #!/bin/bash | |
| ################ | |
| # Uncomment if you want the script to always use the scripts | |
| # directory as the folder to look through | |
| #REPOSITORIES="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" | |
| REPOSITORIES=`pwd` | |
| IFS=$'\n' |