SethTisue

scala> class C
defined class C

scala> implicit val c = new C
c: C = C@33833882

scala> def foo(x: Int)(implicit c: C) = x + 1
foo: (x: Int)(implicit c: C)Int

scala> foo(3)

SethTisue

the people have spoken

45-minute talks:
- Heather Miller, “Academese to English: Scala's Type System, Dependent Types and What It Means To You”
- Daniel Spiewak, “May Your Data Ever Be Coherent”
- Eugene Burmako & Lars Hupel, “Macros vs. Types”

30-minute talks:
- Eugene Yokota, “Learning Scalaz”
- P. Oscar Boykin, “Summingbird: a streaming map-reduce API for Storm, Hadoop and more”

SethTisue

to-report add [a b]
  reset-timer
  wait a
  wait b
  report timer
end

observer> show add 2 2 
observer: 4
observer> show add 2 2 

SethTisue

// pseudo-Scala with nonexistent "yield" in while

val generator =
  while(true) {
    val in = readLine()
    if (in == null)
      break
    yield in
  }

SethTisue

% cd /usr/local/nescala
% echo full details at nescala.org (mobile-friendly)
zsh: number expected

% scala
Welcome to Scala
scala> :power
** Power User mode enabled
scala> ^Z
zsh: suspended  scala

SethTisue

Scalawags #14: Shapelessless

in which Shapeless is only threatened to be discussed.

music and dancing (0:00)

Scala 2.10.4 and 2.11.0-RC3, Java 8 (2:30)

• Josh & co have 900,000 lines of open source Scala code compiling on 2.11.0-RC3
• does 2.10.4 support Java 8? as far as we know. (Daniel had bytecode validation problems with 2.10.1)

SethTisue

Old

combined front/back end

package org.nlogo.prim

class _breedvariable(name: String) extends nvm.Reporter {
  def syntax = core.Syntax.reporterSyntax(...)
  def toString = s"${super.toString}:$name"

SethTisue

Modeling the Transition to Public School Choice
http://jasss.soc.surrey.ac.uk/17/2/3.html
Spiro Maroulis, Eytan Bakshy, Louis Gomez and Uri Wilensky
"The models in this paper were implemented using the NetLogo multi-agent programmable modeling environment"

Optimization of Agent-Based Models: Scaling Methods and Heuristic Algorithms http://jasss.soc.surrey.ac.uk/17/2/6.html
Matthew Oremland and Reinhard Laubenbacher
"NetLogo was chosen as the modeling platform in this study". two models from NetLogo's Sample Models were studied: Rabbits Grass Weeds and Sugarscape

SethTisue

// method bodies in Foo are just dummies

scala> class Foo[T] { def parse(s: String): T = null.asInstanceOf[T] ; def format(t: T): String = ""}
defined class Foo

scala> class C; class D
defined class C
defined class D

scala> val foos = List[Foo[_]](new Foo[C], new Foo[D])

SethTisue

Scalawags #15

starring an Englishman and three hicks from flyover country who don't know Latin

Intro (0:00)

• Daniel mistakenly calls Dick "Bill"
• Josh is so excited about Scala 2.11 his tongue is stuck permanently out

Scala 2.11 announced (4:40)