tatey

class Page < ActiveRecord::Base
  has_attached_file :image, sizes: {small: '10x10', large: '100x100'}
  has_attached_file :uploaded_image

  def safe_image_url
    if image
      image_url
    else
      'spinner.gif'
    end

tatey

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface ErrorFormatter : NSObject

@property (strong, nonatomic) NSError *error;

- (id)initWithError:(NSError *)error;

- (UIAlertView *)alert;

tatey

class TeamFactory
  class PageValue < OpenStruct.new(:page, :name)
  end

  def self.build_from_individual_page page, name = nil, builder = self
    value     = PageValue.new page, name
    team      = builder.build_team value
    team_page = builder.build_team_page value
    builder.persist! team, team_page
    team

tatey

# When using dependency injection, I often find myself storing the dependency as
# an attribute on the object. This is fine, except when you squint at the class there
# looks to be more methods then what's really needed to understand the class.
#
# A typical class with dependency injection might look like this
class TimeParam
  attr_writer :parser

  def initialize value
    @value = value

tatey

# Person has a polymorphic relationship called contactable.
# We want the person's contactable method to return a contact
# of our choosing.

contact     = Contact.new
real_person = Person.find(1)
mock_person = SimpleMock.new(real_person)
mock_person.expect(:contactable, contact)
mock_person.contact == contact # => true

tatey

module Countable
  def self.included do
    define_method "#{self.name}s" do
      # ...
    end
  end

  def self.name
    self.class.to_s.sub('FeedItem', '').downcase
  end

tatey

Upgrade rails to 2.3.9.

2.3.9 fixes a bug that we had come to depend on
(https://github.com/rails/rails/pull/7661). It's best described with an
example

2.3.8

    p = Plan.new
    p.member = Member.first

tatey

<h1>New Plan</h1>
<div ng-app>
  <%= form_for @plan do |form| %>
    <div ng-controller="PollCtrl" ng-init="polls = <%= @plan.polls.to_json %>">
      <div ng-repeat="poll in polls">
        <%= form.fields_for :polls, Poll.new, child_index: '{{$index}}' do |poll_form| %>
          <%= poll_form.text_field :title, id: 'plan_poll_{{$index}}', value: '{{poll.title}}' %>
        <% end %>
        <a href="#" ng-click="remove($index)" ng-show="isRemovable()">Remove</a>
      </div>

tatey

# Known poll types. Unknown types will raise
# an exception.
#
#   Poll::ChoiceTypes.time # => 'Choice::Time'
#
# @return [Struct]
ChoiceTypes = Struct.new(:time, :place, :text).new.tap do |types|
  types.time  = 'Choice::Time'
  types.place = 'Choice::Place'
  types.text  = 'Choice::Text'

tatey

class RubyExample
  CONSTANT = /^[0-9]+ regex awesomes$/

  attr_reader :colorscheme

  def initialize(attributes = {})
    @colorscheme = attributes[:colorscheme]
  end

  def self.values