# config/initializers/load_config.rb
APP_CONFIG = YAML.load(ERB.new(File.read("#{Rails.root}/config/app_config.yml")).result)[Rails.env]

# config/app_config.yml
development:
  key1: <%= # ruby code ... %>

# config/initializers/load_config.rb
APP_CONFIG = YAML.load_file("#{Rails.root}/config/app_config.yml")[Rails.env]

# config/app_config.yml
development:
  key1: development value 1

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">

# Based on Larry's and Damian's Perl6 talk at OSCON 2009
@fib = 0,1...&[+]

fib = Hash.new {|h,n| h[n] = h[n-1] + h[n-2] }
fib[0] = 0
fib[1] = 1

$(function() {
  $('#payment_sent_on_today').click(function() {
    var today = new Date();

<%= f.label :payment_sent_on %>
<%= f.date_select :payment_sent_on, :include_blank => true %>
<%= link_to 'Today', '#', :id => 'payment_sent_on_today' %>

def payment_sent_on_today
  @billable = Billable.new(:payment_sent_on => Date.today)
  render :update do |page|

<%= f.label :payment_sent_on %>
<span id="payment_sent_on">
  <%= f.date_select :payment_sent_on, :include_blank => true %>

Autotest.add_hook :initialize do |at|
  at.add_exception %r{^vendor/}
  nil

Autotest.add_hook :initialize do |at|
  at.add_exception 'vendor'
  nil

<!-- day.html.haml -->
<h1>Billables | Daily</h1>
<table>

<!-- day.html.haml -->
<h1>Billables | Daily</h1>
<%= render :partial => 'billables' %>

$ defaults write com.apple.finder AppleShowAllFiles FALSE
$ killall Finder

$ defaults write com.apple.finder AppleShowAllFiles TRUE
$ killall Finder

=SUM(FILTER('Worksheet name'!D2:D; 'Worksheet name'!E2:E="food"))