Snippets

/usr/sbin/ioreg -p IODeviceTree -n battery -w 0 | grep IOBatteryInfo

or

ioreg -l -w0 | grep -i IOBatteryInfo

@params[:tags].map do |tag|
	Tag.find_by_name (tag) rescue nil
end

                    When you don't want an application to apply to a certain action.. say AJAX or RSS/xml output..

layout 'application', :except => :create_with_ajax

Person.find_by_user_name_and_password(user_name, password)

<%= select('user', 'sites', Site.find_all.collect  {|site| site.name}) %>

                    Someone in #rubyonrails wrote this. Forget who!

def paginate_from_sql(model, sql, total, per_page)
  @object_pages = Paginator.new self, total, per_page, @params['page']
  @objects = model.find_by_sql(sql + " LIMIT #{per_page} " +
                               "OFFSET #{@object_pages.current.to_sql[1]}")
end

class Song < ActiveRecord::Base
  # Uses an integer of seconds to hold the length of the song

  def length=(minutes)
    write_attribute("length", minutes * 60)
  end

  def length
    read_attribute("length") / 60
  end
end