Josh Chen montekaka

become active record migration expert (Rails 4.0.2)

workflow:

$ rails g model NameOfModel
    invoke  active_record
    create    db/migrate/YYYYMMDDHHMMSS_create_name_of_models.rb

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

$ rails g model User

belongs_to

has_one

	var fs = require('fs');

	fs.readFile('subtitle.srt', function(error, data) {
	if(error)
	throw error;

	var text = data.toString();
	var lines = text.split('\n');

	var output = [];

	t = 236 # seconds
	Time.at(t).utc.strftime("%H:%M:%S")
	=> "00:03:56"

	# Reference
	# http://stackoverflow.com/questions/3963930/ruby-rails-how-to-convert-seconds-to-time

	# Nginx can serve FLV/MP4 files by pseudo-streaming way without any specific media-server software.
	# To do the custom build we use 2 modules: --with-http_secure_link_module --with-http_flv_module
	# This module "secure-link" helps you to protect links from stealing away.
	#
	# NOTE: see more details at coderwall: http://coderwall.com/p/3hksyg

	cd /usr/src
	wget http://nginx.org/download/nginx-1.5.13.tar.gz
	tar xzvf ./nginx-1.5.13.tar.gz && rm -f ./nginx-1.5.13.tar.gz

	# (c) Thomas Fritzsche
	# This is prove-of-concept coding only
	# iOS devices insist on support for byte-rage http header, that is not native
	# supported by rack apps like dragonfly
	# this rack middleware will evaluate the http header and provide byte range support.

	# For a dragonfly Rails (3.2.3) app I have tested this will call like this.
	# I reload Rack::Cache that case trouble when initialized by Rails.
	# This small trick makes it working :-)
	#-----------------------