jonlabelle

Television Standards

Digital and analog television standards resolution reference.

Digital TV Standards

Standard	Resolution (dots × lines)	DAR (H:V)	Pixels
PixelVision	120 × 90	4:3	10,800

Integralist

curl --header 'Authorization: token INSERTACCESSTOKENHERE' \
     --header 'Accept: application/vnd.github.v3.raw' \
     --remote-name \
     --location https://api.github.com/repos/owner/repo/contents/path

# Example...

TOKEN="INSERTACCESSTOKENHERE"
OWNER="BBC-News"
REPO="responsive-news"

nicktoumpelis

git checkout --orphan temp_master
git rm -rf .

git commit --allow-empty -m 'Make initial root commit'
git rebase --onto temp_master --root master
git branch -D temp_master

pchiusano

trait ConsoleAlg[F[_]] {
  def readLine: F[Option[String]]
  def printLine(line: String): F[Unit]
}

trait Console[+A] {
  def run[F[+_]](F: ConsoleAlg[F]): F[A]
}

object Console {

eulerfx

Both command sourcing (CS) and event sourcing (ES) rely on determinism for correctness.

The correctness condition for ES is the determinism (purity) of the function State -> Event -> State. Given that this function is deterministic, aka it always maps the same inputs to the same ouputs, we can rely on it to reconstitute state at any point in time. Determinism is typically achieved by ensuring that the Event has all required information to make the state transition, ie no side effects. The Event then is a sort of "closure" of all pertinent information about the event.

The correctness condition for CS is the determinism of the function State -> Command -> Event. Herein lies one of the distinctions between command sourcing and event sourcing - a program can control its output, but it not its input. Since one can't control the input, aka command, one can't in general, enrich it with all required information to make the above function deterministic. A consequence of this is that you can't simply replay a

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

jacobblock

FreeNAS

I started using FreeNAS in August 2013. It is fantastic piece of software and I have been really impressed by the upgrades just in the few months I've been using it. It looks like they recently went to a plugin system as of version 9 to make installing software easier for end users. I've ran into several issues related to plugins and user + group permissions so I decided to just use the available FreeBSD port system. After fiddling for a few days (now turned into months) I believe I have created something helpful for the community and anyone interested in picking up the port system. The sandbox nature of FreeNAS's jail system is especially helpful for playing around without having any consequence on your core system.

Here are straight-forward instructions to setting up a bunch of different software on FreeNAS. If you make a terrible error, just throw up another plugin sandbox and repeat.

ToC

nickstenning

alias dockercleancontainers="docker ps -a --no-trunc | grep 'Exit' | awk '{print $1}' | xargs docker rm"
alias dockercleanimages="docker images --no-trunc | grep none | awk '{print $3}' | xargs docker rmi"
alias dockerclean="dockercleancontainers && dockercleanimages"

miguel-vila

ScalaCheck The Definitive Guide

Chapter 1

• A specification is a definition of a program’s behavior in the general case. Preferably, a specification should not deal with concrete examples of program functionality. Instead it should provide an abstract description of the behavior, that you can use both when implementing the program and when verifying it.

• Specifications, on the other hand, give us a more complete picture of the program but they are often informal and difficult to verify formally. Instead, tests are used to verify specific cases of a specification.

• Tests as specification is a concept that is gaining popularity in many test-driven software development processes.

trusktr

/* ~/Library/KeyBindings/DefaultKeyBinding.Dict

This file remaps the key bindings of a single user on Mac OS X 10.5 to more
closely match default behavior on Windows systems. This makes the Command key
behave like Windows Control key. To use Control instead of Command, either swap
Control and Command in Apple->System Preferences->Keyboard->Modifier Keys...
or replace @ with ^ in this file.

Here is a rough cheatsheet for syntax.
Key Modifiers