jdegoes

Introduction

LambdaConf has multiple tracks, so no attendee can possibly attend all sessions.

Yet, we'd like to schedule the sessions to maximize attendee happiness (for some definition of "maximum" and "happiness").

Sounds like a job for functional programming!

Your mission, should you choose to accept it, is to write a small functional program to produce an "optimal" schedule (your schedule may have any number of tracks you want -- you do not have to stick with 3 or 4).

vmarquez

  object Test {   
    import scalaz.{Lens,State}   
    case class BlahConfig(server: Int, l: List[Int]) 
     
    def doStuff(i: Int) = State[BlahConfig,Int]( c => (c.copy(l = i :: c.l), c.server) ) 
   
    case class FooConfig(val password: String) 
   
    def doSomeStuff(i: Int) = State[FooConfig, String](c =>(c, c.password)) 
    

mpilquist

target

kevinwright

class Filters[T] {

  //Some boilerplate-busting aliases
  type FilterResult = Either[Rejection, T]
  type FilterFunc = (T) => FilterResult

  //Handy helpers
  //Rejection can carry as much info as you wish;
  //  Filter name, value in error, an exception, etc.
  case class Rejection(input: T, msg: String)

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

SethTisue

Scalawags #33: Back to School

YouTube link: https://www.youtube.com/watch?v=z1uviQbKe0U

Your hosts: Josh Suereth, Dick Wall, Daniel Spiewak, Seth Tisue

Join us during and between episodes for web-based Scalawags chat on Gitter.

Intro (0:00)

davidread

1. Register for Microsoft account at https://signup.live.com/signup
2. Email verification - click link (logs you in)
3. Register on Azure Data Market at https://datamarket.azure.com/register
4. Go to: https://datamarket.azure.com/dataset/datagovuk/metofficeweatheropendata click 'Sign up' then 'agree', then 'sign up'.

Use Web i/f to download CSV:
At: https://datamarket.azure.com/dataset/explore/0f2cba12-e5cf-4c6d-83c9-83114d44387a click 'Explore', 'Three Hourly Forecast' and 'Download Excel (CSV)'

or by API:
Go to: https://datamarket.azure.com/account for account key

vmadman

[program:lss]
process_name=Shipper
command=java -jar /usr/local/logstash/bin/logstash-1.1.9-monolithic.jar agent --config /usr/local/logstash/conf/shipper.conf --log /usr/local/logstash/log/shipper.log
user=logstash
startretries=3
redirect_stderr=true
std_out_logfile=NONE
startsecs=3
environment=HOME="/usr/local/logstash/"

johnynek

object Monad {
  trait Monad[F[_]] {
    def pure[A](a: A): F[A]

    /**
     * We can have a default implementation in terms of tailRecM
     * and map
     */
    def flatMap[A, B](fa: F[A])(fn: A => F[B]): F[B] = {
      def step(first: Option[A]): F[Either[Option[A], B]] =

pcting

import akka.http.scaladsl.model.HttpHeader
import akka.http.scaladsl.model.HttpMethods._
import akka.http.scaladsl.model.HttpResponse
import akka.http.scaladsl.model.headers.`Access-Control-Allow-Credentials`
import akka.http.scaladsl.model.headers.`Access-Control-Allow-Methods`
import akka.http.scaladsl.model.headers.`Access-Control-Allow-Origin`
import akka.http.scaladsl.model.headers.Origin
import akka.http.scaladsl.server.Directive0
import akka.http.scaladsl.server.Directives._
import akka.http.scaladsl.server.MethodRejection