jlebrech

  alias :save :user_confirm
  alias :delete :user_confirm
  def user_confirm(current_user)
    unless self.user == current_user
      errors.add(:user, 'Must be you')
    else
      super
    end
  end

jlebrech

<% widget_coffee :my_widget do %>
  ... some coffeescript excluding closure wrapping
  ... this content gets compiled into application.js once.
<% end %>

<% widget_sass :my_widget do %>
  ... namespaced styling for my_widget
  ... this gets compiled into application.css once.
<% end %>

jlebrech

# class AddCategories < ActiveRecord::Migration
#   def up
#     create_table :categories do |t|
#       t.string :name
#       t.integer :score
#       ... # other examples
#   	end
#   end

#   def down

jlebrech

# loop through article containing the old_tag
Article.tagged_with(old_tag).each do |article|
  # give articles with the old tag the new tag
  article.tag_list.add(new_tag)
  # remove the old tag
  article.tag_list.remove(old_tag)

  article.save # this isn't 
end

jlebrech

class MyClass
  def initialiser
    defn /do_([a-z]*)_to_([a-z]*)/, :do_x_to_y 
  end

  def defn(regex, &proc)
    @@missing_things = [] if @@missing_things.nil?
    @@missing_things << [ regex, proc ]
  end
  

jlebrech

ship = bodies[1]
shipVec = vector(ship:getX(),ship:getY())
planet = bodies[2]
planetVec = vector(planet:getX(),planet:getY())
distance = planetVec – shipVec
force = 250 / distance:len2()
normforce = force*distance
bodies[1]:applyImpulse(normforce.x, normforce.y,ship:getX(),ship:getY())

jlebrech

<select 
  ng-model="selected.service_plan" 
  ng-options="item.id as ('£' + item.label) for item in billing_info.service_plans">
</select>

what's wrong with looping through stuff rather than come up with some expression language? speed?

jlebrech

Say we had the following structure

App
 -> Views
    -> ABC
       abc.erb
       -> partials
         _a.erb
         _b.erb
         _c.erb

jlebrech

t=Ticket.arel_table # the arel table to extract subqueries from

if params[:title].length > 0 then
   sqla = t[:title].matches("%#{params[:title]}%")
else
   sqla = nil
end

if params[:from].length > 0 then
   sqlb = t[:from].matches("%#{params[:from]}%")

jlebrech

tags=Tag.arel_table
@tags = Tag.where(tags[:label].matches("%#{params[:term]}%"))