owainlewis

// covariant functor
trait Functor[F[_]] {
  def fmap[A, B](f: A => B): F[A] => F[B]
}

// contravariant functor
trait Contravariant[F[_]] {
  def contramap[A, B](f: B => A): F[A] => F[B]
}

deltheil

Easy handle interface

Options

• CURLOPT_DNS_CACHE_TIMEOUT: controls the TTL of a DNS cache entry. The default is 60s. Use -1 to keep the entry forever.
• CURLOPT_RESOLVE: pre-populate the DNS cache manually.
• CURLOPT_DNS_SERVERS: use alternate DNS servers (instead of system default ones). Warning: works only with c-ares (and it requires c-ares version >= 1.7.4),
• CURLOPT_DNS_USE_GLOBAL_CACHE: cache DNS queries between easy handles. Warning: this is not thread-safe and documented as deprecated. Use the share interface instead (see below).

Info

ashrithr

Introduction to Kafka

Kafka acts as a kind of write-ahead log (WAL) that records messages to a persistent store (disk) and allows subscribers to read and apply these changes to their own stores in a system appropriate time-frame.

Terminology:

• Producers send messages to brokers
• Consumers read messages from brokers
• Messages are sent to a topic

PanzerKunst

import scala.concurrent.duration.FiniteDuration

/**
 * The email message sent to Actors in charge of delivering email
 *
 * @param subject the email subject
 * @param recipient the recipient
 * @param from the sender
 * @param text alternative simple text
 * @param html html body

drexin

import java.io.File
import language.experimental.macros
import scala.reflect.macros.Context

object Macros {

  def LINE: Int = macro lineImpl

  def lineImpl(c: Context): c.Expr[Int] = {
    import c.universe._

kazuho

#MessagePackの文字列型追加において、Extended型を導入する提案

本提案は https://gist.github.com/frsyuki/5022569 https://gist.github.com/frsyuki/5022460 において提案された「バイナリ型」の構造に変更を施すものである。

##解決しようとする問題

• MessagePackへの拡張は今後行われないとしても、独自に拡張する提案が今後頻発しそう
• 拡張フォーマットは、既存のMessagePackに対して後方互換にならない（なりようがない）ため、相互運用性を損なう可能性が高い。これが問題

##提案する手法

clemensg

/* curl_multi_test.c

   Clemens Gruber, 2013
   <clemens.gruber@pqgruber.com>

   Code description:
    Requests 4 Web pages via the CURL multi interface
    and checks if the HTTP status code is 200.

   Update: Fixed! The check for !numfds was the problem.