mbostock

license: gpl-3.0

paf31

This blog post series has moved here.

You might also be interested in the 2016 version.

tpolecat

import scalaz.{ Free, Coyoneda, Monad, ~>, State, NonEmptyList }
import scalaz.std.function._
import scalaz.syntax.monad._
import scalaz.effect.IO

import scala.util.Random

object freecoyo extends App {

  // An algebra of primitive operations in the context of a random number generator

non

Introduction

Machinist Issue #2 asks:

Is it correct, that this stuff is completely obsolete now due to value classes or are there still some use cases? An example of using value class for zero-cost implicit enrichment: [...]

The short answer is that Machinist is not obsolete: value classes existed before the Machinist macros were implemented, and they do not solve the

postspectacular

# Live coding example for Retune conference 2014
# 1) Press Run (Cmd+R) to start
# 2) Make changes (e.g. comment in/out various lines in :beats & :amen)
# 3) Press Run again (changes will only be audible from next queue point)

# compute loop length (4 bars), bar & quarter note durations
dur = sample_duration :loop_compus
bar = dur / 4
quart = dur / 16

gigamonkey

. 5 . | . . 1 | 4 7 9
. . 2 | 7 . . | . . 8
. . . | . 4 6 | 2 . .
------+-------+------
. 4 6 | . . 9 | 5 3 7
. . . | . 6 . | . . .
8 9 3 | 5 . . | 6 4 .
------+-------+------
. . 9 | 6 1 . | . . .
1 . . | . . 2 | 3 . .

VladUreche

# Scaladoc Developer Guide
## Introduction
Scaladoc is the tool that enables developers to automatically generate documentation for their Scala (and Java) projects. It is Scala's equivalent of the widely-used Javadoc tool. This means that Javadoc (and even doxygen) users will be familiar with Scaladoc from day 1: for them, it is most beneficial to check out the Scaladoc/Javadoc comparison tables and if necessary, skim through this document to understand specific features. 

The rest of this tutorial is aimed at developers new to Scaladoc and other similar tools. It assumes a basic understanding of the Scala language, which is necessary to follow the examples given throughout the tutorial. For the user perspective on the Scaladoc-generated documentation, such as finding a class, understanding the page layout, navigating through diagrams, please refer to the Scaladoc User Guide.

The tutorial will start by a short motivation and then will explain the main concept in Scaladoc: the doc comment.

### Why document?

voila

module Date

-- leap year ?
leap : Integer -> Bool
leap year = (mod year 4 == 0) && ((mod year 400 == 0) || not (mod year 100 == 0))

-- number of days in month/year
days : Integer -> Integer -> Integer
days 2     year = if leap year then 29 else 28 
days month _    = if month `List.elem` [4,6,9,11] then 30 else 31

larsrh

scalaVersion := "2.10.2"

resolvers += Resolver.sonatypeRepo("snapshots")

libraryDependencies += "org.typelevel" %% "shapeless-scalaz" % "0.2-SNAPSHOT"

libraryDependencies += "org.typelevel" %% "shapeless-scalacheck" % "0.2-SNAPSHOT"

initialCommands in console := """
  import scalaz._

milessabin

import shapeless._

sealed trait List[+T]
case class Cons[T](hd: T, tl: List[T]) extends List[T]
sealed trait Nil extends List[Nothing]
case object Nil extends Nil

trait Show[T] {
  def apply(t: T): String
}