cseringgo

Rotate videos 90 or 180 degrees using ffmpeg.

eulerfx

A state machine is defined as follows:

• Input - a set of inputs
• Output - a set of outputs
• State - a set of states
• S0 ∈ S - an initial state
• T : Input * State -> Output * State - a transition function

If you model your services (aggregates, projections, process managers, sagas, whatever) as state machines, one issue to address is management of State. There must be a mechanism to provide State to the state machine, and to persist resulting State for subsequent retrieval. One way to address this is by storing State is a key-value store. Another way is to use a SQL database. Yet another way is event sourcing. The benefit of even sourcing is that you never need to store State itself. Instead, you rely on the Output of a service to reconstitute state. In order to do that, the state machine transition function needs to be factored into two functions as follows:

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.

---

tsenart

package main

import (
	"net/http"
	"database/sql"
	"fmt"
	"log"
	"os"
)

anthonysterling

# Usage:    IE={box} vagrant up
#
# Eg.       IE=XPIE6 vagrant up

boxes = {
    "XPIE6"     => "http://aka.ms/vagrant-xp-ie6",
    "XPIE8"     => "http://aka.ms/vagrant-xp-ie8",
    "VistaIE7"  => "http://aka.ms/vagrant-vista-ie7",
    "Win7IE8"   => "http://aka.ms/vagrant-win7-ie8",
    "Win7IE9"   => "http://aka.ms/vagrant-win7-ie9",

paulirish

Screencapture and animated gifs

I say "animated gif" but in reality I think it's irresponsible to be serving "real" GIF files to people now. You should be serving gfy's, gifv's, webm, mp4s, whatever. They're a fraction of the filesize making it easier for you to deliver high fidelity, full color animation very quickly, especially on bad mobile connections. (But I suppose if you're just doing this for small audiences (like bug reporting), then LICEcap is a good solution).

Capturing (Easy)

1. Launch quicktime player
2. do Screen recording

magicznyleszek

Atom Keyboard Shortcuts

General

shift + ⌘ + p -- toggle command palette

⌘ + / -- toggle line/selection comment

alt + shift + s -- show available snippets

justmoon

'use strict';

module.exports = function CustomError(message, extra) {
  Error.captureStackTrace(this, this.constructor);
  this.name = this.constructor.name;
  this.message = message;
  this.extra = extra;
};

require('util').inherits(module.exports, Error);

georgiana-gligor

Create PDF files from Markdown sources in OSX

When [Markdown][markdown] appeared more than 10 years ago, it aimed to make it easier to express ideas in an easy-to-write plain text format. It offers a simple syntax that takes the writer focus away from the formatting, thus giving her time to focus on the actual content.

The market abunds of editors to be used for help with markdown. After a few attempts, I settled to Sublime and its browser preview plugin, which work great for me and have a small memory footprint to accomplish that. To pass the results around to other people, less technical, a markdown file and a bunch of images is not the best approach, so converting it to a more robust format like PDF seems like a much better choice.

[Pandoc][pandoc] is the swiss-army knife of converting documents between various formats. While being able to deal with heavy-weight formats like docx and epub, we will need it for the more lightweight markdown. To be able to generate PDF files, we need LaTeX. On OSX, the s

markdalgleish

import transitions from './transitions.css';

export default () => (
  <ReactCSSTransitionGroup transitionName={transitions}>
    { ... }
  </ReactCSSTransitionGroup>
);