davetron5000

Have seen a few play apps' source and it feels like massive boilerplate and leaky promise/future/async crud everywhere.

Lets take this:

https://github.com/guardian/frontend/blob/master/article/app/controllers/ArticleController.scala

case class ArticlePage(article: Article, storyPackage: List[Trail], edition: String)

object ArticleController extends Controller with Logging {

propensive

object Algebra {

  // Build up increasingly complex algebras
  trait Magma[T] {
    def add(x : T, y : T) : T
  }

  trait Monoid[T] extends Magma[T] {
    def zero : T
  }

guillaumebort

web: target/start -Dhttp.port=${PORT} -Dconfig.resource=prod.conf ${JAVA_OPTS}

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

guillaumebort

# --- !Ups

CREATE TABLE users(
  email                     VARCHAR(255) NOT NULL PRIMARY KEY,
  name                      VARCHAR(255)
);

CREATE TABLE subjects(
  id                        INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
  title                     LONGTEXT NOT NULL,

sadache

package controllers

import play.api._
import play.api.mvc._
import play.api.libs.ws._
import play.api.libs.iteratee._
import play.api.libs.concurrent._

object Application extends Controller {
	

stonegao

import akka.actor.Actor
import akka.actor.ActorSystem
import akka.agent.Agent
import com.typesafe.config.ConfigFactory
import akka.event.Logging
import akka.actor.Props
import kafka.utils.Utils
import java.nio.ByteBuffer

fcroiseaux

  /**
   * Handles the comet event stream.
   */
  def cometStream = Action {
    AsyncResult {
      implicit val timeout = Timeout(5.seconds)
      val actor=Akka.system.actorOf(Props[EventListener])
      // Actor is listening for event on the eventStream
      Akka.system.eventStream.subscribe(actor,classOf[ChangeEvent])
      // For each event, stream the data to client

retronym

scala> import scala.language.experimental.macros
import scala.language.experimental.macros

scala> def unimplicitlyImpl[A: c.TypeTag](c: reflect.makro.Context) = {
     |   val A = implicitly[c.TypeTag[A]].tpe
     |   val i = c.inferImplicitValue(A, silent = true)
     |   if (i == c.mirror.EmptyTree) c.reify(())
     |   else sys.error("unexpected implicit of type %s: %s".format(A, i))
     | }
unimplicitlyImpl: [A](c: scala.reflect.makro.Context)(implicit evidence$1: c.TypeTag[A])c.mirror.Expr[Unit]

ThomasAlexandre

case class Deal( title:String = "", discount:Int = 0, city:String = "" )
val deal = Deal()
val deal = Deal("Hotel")
val deal = Deal("Hotel",city="Paris")
val betterDeal = deal.copy(discount=50)
import dispatch._
val request = url("http://localhost:8086/deals")
Http( request >>> System.out)
val deals = Http( request as_str )
val dealsAsXml = Http( request.handleResponseAsXml({ response => response }) )