Risto Stevcev Risto-Stevcev

Getting Started in Scala

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.

	commit ea830e03d4d4562b1ff225940f65bceddd9cad6c
	Author: Hayaki Saito <[email protected]>
	Date: Sun Jun 11 23:46:45 2017 +0900

	Add sixel graphics support

	Signed-off-by: Hayaki Saito <[email protected]>

	diff --git a/Makefile b/Makefile
	index d8595fe..a25d040 100644

	mysql> create table garbage (`why` enum('are', 'you') not null);
	Query OK, 0 rows affected (0.16 sec)

	mysql> insert into garbage values ('mysql'), ('hates'), ('you');
	Query OK, 3 rows affected, 2 warnings (0.02 sec)
	Records: 3 Duplicates: 0 Warnings: 2

	mysql> select * from garbage;
	+-----+
	\| why \|

	import scala.language.higherKinds

	object Lenses {

	trait Profunctor[P[_, _]] {
	def dimap[A, B, C, D](f: C => A, g: B => D)(p: P[A, B]): P[C, D]
	}

	object Profunctor {

	{-# LANGUAGE DataKinds, TypeFamilies, TypeOperators, GADTs,
	ScopedTypeVariables, TypeOperators #-}

	-- \| Type-level natural numbers and singletons, with proofs of
	-- a few basic properties.

	module BasicNat (
	-- \| Type-level natural numbers
	Nat (..)
	, type (+)

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>JS Bin</title>
	<style id="jsbin-css">
	.togglePill.togglePill-true:after {
	background-position: 0px;
	width: 40px;

	#!/bin/bash -e
	# Creates a systemd-nspawn container with Alpine

	MIRROR=http://dl-cdn.alpinelinux.org/alpine
	VERSION=${VERSION:-v3.21}
	APKTOOLS_VERSION=2.14.6-r3


	wget_or_curl () {
	if command -v wget >/dev/null; then

	➜ ~ planck
	Planck 1.17
	ClojureScript 1.9.229
	Docs: (doc function-name-here)
	(find-doc "part-of-name-here")
	Source: (source function-name-here)
	Exit: Control+D or :cljs/quit or exit or quit
	Results: Stored in vars 1, 2, 3, an exception in e

	cljs.user=> (time (apply + (range 1e7)))

	module Printf

	%default total

	-- Formatting AST.
	data Format
	= FInt Format
	\| FString Format
	\| FOther Char Format
	\| FEnd

Risto Stevcev Risto-Stevcev

Getting Started in Scala

Getting the JVM