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module Slugable
  module ClassMethods
    def find_by_slug(param)
      if to_return = where("lower(name) LIKE ?", "#{patternify(param)}")
        to_return.first
      else
        nil
      end
    end

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# config/rails_admin.rb

config.excluded_models = Dir.glob(Rails.root.join('app/models/concerns/**.rb')).map {|p| 'Concerns::' + File.basename(p, '.rb').camelize }

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require 'resque'
require 'resque_scheduler'
require 'resque/server'
require 'resque_scheduler/server'

schedules = YAML.load_file(Rails.root.join('config', 'schedules.yml'))

$redis = Resque.redis = Redis.current = Redis.new( url: ENV['REDIS_URI'] )
Resque.schedule = schedules

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class EmailValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    unless value =~ /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i
      record.errors[attribute] << (options[:message] || 'is not an email')
    end
  end
end

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require 'digest/sha1'
#
# A wrapper for generating SHA1 hash value
# Simply done by concatenating all values using the colon symbol for delimiter.
# This algorithm is mostly used by payment gateways.
#
# Usage:
#
#   SHA1Generator.digest('foo', 'bar', 'fizz', 'buzz')
#   => "e723e86a6000fc8462142eb4821672de107535c1"           # 40 chars

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/* 

1.) If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

   Find the sum of all the multiples of 3 or 5 below 1000.

*/

// Solution in PHP, the simple way:

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# in rails application.rb
 
initializer "postgresql.no_default_string_limit" do
  ActiveSupport.on_load(:active_record) do
    ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::NATIVE_DATABASE_TYPES[:string].delete(:limit)
  end
end

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=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

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(function(d) { 
  var dl = d.createElement('a');
  dl.innerText = 'Download MP3';
  dl.href = "http://media.soundcloud.com/stream/"+d.querySelector('#main-content-inner img[class=waveform]').src.match(/\.com\/(.+)\_/)[1];
  dl.download = d.querySelector('em').innerText+".mp3";
  d.querySelector('.primary').appendChild(dl);
  dl.style.marginLeft = '10px';
  dl.style.color = 'red';
  dl.style.fontWeight = 700;
})(document);

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# Deploying a Sinatra app to Heroku

## Database
The location of the database Heroku provides can be found in the environment
variable DATABASE_URL. Check the configure-block of toodeloo.rb for an example
on how to use this.

## Server
Heroku is serving your apps with thin, with means you have all your thin goodness available,
such as EventMachine.