oinume

require 'java'

require 'rubygems'
require 'dbi'
require 'dbd/Jdbc'
require 'jdbc/mysql'

Jdbc::MySQL.load_driver
DBI.connect(
  'DBI:Jdbc:mysql://localhost/test',

milessabin

// An ADT+shapeless as a drop-in replacement for a standard Scala Enumeration.
//
// First the unsafe standard Scala Enumeration ...
//
object ScalaEnumDemo extends App {
  // Example from scala.Enumeration scaladoc. Terse ...
  object WeekDay extends Enumeration {
    type WeekDay = Value
    val Mon, Tue, Wed, Thu, Fri, Sat, Sun = Value
  }

pchiusano

Hi all!

After a very lengthy period of development and testing, FS2 (formerly scalaz-stream) version 0.9 is finally out! Here's how to get it.

For this release, the library has undergone a major redesign. Check out the migration guide for more info, and also the shiny new user guide. Going forward, we expect the API of the library will be quite stable and hope it becomes one of the bedrock libraries of the Scala ecosystem. The 0.9 series has already seen production use as well as a huge amount of testing during the development process; we feel very good about recommending people upgrade.

ayosec

Test with

$ sbt run

And then,

$ curl localhost:8080/mars/hi

$ curl localhost:8080/jupiter/hi

milessabin

import scala.language.experimental.macros

import scala.reflect.macros.whitebox

trait Foo[T]

object Foo {
  implicit def mkFoo[T]: Foo[T] = macro FooMacros.mkFooImpl[T]
}

milessabin

scala> trait Assoc[K] { type V ; val value: V }
defined trait Assoc

scala> def mkAssoc[V0](k: String, v: V0): Assoc[k.type] { type V = V0 } =
     |   new Assoc[k.type] { type V = V0 ; val value = v }
mkAssoc: [V0](k: String, v: V0)Assoc[k.type]{type V = V0}

scala> implicit def nameAssoc = mkAssoc("Name", "Mary")
nameAssoc: Assoc[String("Name")]{type V = String}

kevinwright

As compiled by Kevin Wright a.k.a @thecoda

(executive producer of the movie, and I didn't even know it... clever huh?)

please, please, please - If you know of any slides/code/whatever not on here, then ping me on twitter or comment this Gist!

This gist will be updated as and when I find new information. So it's probably best not to fork it, or you'll miss the updates!

Monday June 16th

milessabin

Welcome to Scala version 2.10.2 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_21).
Type in expressions to have them evaluated.
Type :help for more information.

scala> class Prefix { class Dep { type P = Prefix.this.type } }
defined class Prefix

scala> val (p1, p2) = (new Prefix, new Prefix)
p1: Prefix = Prefix@2212c414
p2: Prefix = Prefix@7e070e85

alexandru

Monix Task: A diverging design

This document is about Task, an alternative for Scalaz's Task or Scala's Future. Note this is work in progress and this document suffered multiple modifications already:

• Jan 26, 2016
• Dec 23, 2015
• Dec 22, 2015
• Dec 21, 2015
• Dec 20, 2015

milessabin

// Used as a term `the[T]` yields the unique implicit value of type `T` in the current
// implicit scope, if any. It is a compile time error if there is no such value. Its
// primary advantage over `Predef.implicitly` is that it will preserve any refinement that
// the implicit definition has, resulting in more precisely typed, and hence often more
// useful, values,

scala> trait Foo { type T ; val t: T }
defined trait Foo

scala> implicit val intFoo: Foo { type T = Int } = new Foo { type T = Int ; val t = 23 }