stevegraham

class AppConfig
  # Loads a YAML configuration file from RAILS_ROOT/config/. The default file
  # it looks for is 'application.yml', although if this doesn't match your
  # application, you can pass in an alternative value as an argument 
  # to AppConfig.load.
  # After the file has been loaded, any inline ERB is evaluated and unserialized
  # into a hash. For each key-value pair in the hash, class getter and setter methods
  # are defined i.e., AppConfig.key => "value" 
  # This allows you to store your application configuration information e.g., API keys and 
  # authentication credentials in a convenient manner, external to your application source

stevegraham

class Ability
  include CanCan::Ability

  def initialize(user)
    return if user.nil?
    
    # Collect rights from roles
    authorizations = HashWithIndifferentAccess.new []
    user.roles.each do |role|
      role.resource_rights.each { |resource,actions| authorizations[resource] |= actions }

stevegraham

# Run this file in the same directory as weather.dat 

class NOAAParser
  def initialize(file)
    # Reject all lines in file that don't begin with whitespace and integer
    @lines = IO.readlines(file).select { |line| line =~ /^\s+\d/ }
  end
  
  def day_with_lowest_temp_spread
    # Maybe this regexp could be cleaner?

stevegraham

[NilClass, FalseClass, TrueClass, Symbol, Numeric, Class, Module].each { |klass| klass.class_eval { def duplicable?() false end } }

# Or even…

[NilClass, FalseClass, TrueClass, Symbol, Numeric, Class, Module].each do |klass|
  klass.class_eval { def duplicable?() false end }
end

stevegraham

require "rubygems"
require "active_record"
require 'mysqlplus'

Mysql.class_eval { alias :query :async_query }
 
ActiveRecord::Base.establish_connection(
  :adapter => "mysql",
  :username => "root",
  :database => "test",

stevegraham

%w(rubygems eventmachine em-http-request yajl).each { |lib| require lib }

module Twitter
  def on_tweet() lambda { |obj| puts obj['text'] }; end
  extend self
end

EM::run do
  req = EM::HttpRequest.new('http://stream.twitter.com/1/statuses/sample.json').get :head => { 'authorization' => ['eventmachine', 'eventm4chine'] }
  parser = Yajl::Parser.new.tap { |p| p.on_parse_complete = Twitter.on_tweet }

stevegraham

run lambda { |env| [302, {'Content-Type'=>'text/plain', 'location' => 'http://blog.shrewple.com'}, Array.new] }

stevegraham

def method_missing(meth, *args, &blk)
  if value.include? meth
    class << self; self; end.instance_eval { define_method(meth) { value[meth] } }
    send meth
  else
    super
  end
end

stevegraham

while self[:slug].nil? && Referral.exists? :slug => self[:slug]
  self[:slug] = ActiveSupport::SecureRandom.hex 6
end

stevegraham

require 'open-uri'
def r b; b*38 if URI('http://roulette.engineyard.com/').read[/13/] end