endolith

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zhengjia

=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')

rantoniuk

namespace :db do  desc "Backup project database. Options: DIR=backups RAILS_ENV=production MAX=7" 
  task :backup => [:environment] do
    datestamp = Time.now.strftime("%Y-%m-%d_%H-%M-%S")    
    base_path = Rails.root
    base_path = File.join(base_path, ENV["DIR"] || "backups")
    backup_base = File.join(base_path, 'db_backups')
    backup_folder = File.join(backup_base, datestamp)
    backup_file = File.join(backup_folder, "#{RAILS_ENV}_dump.sql")    
    FileUtils.mkdir_p(backup_folder)    
    db_config = ActiveRecord::Base.configurations[RAILS_ENV]    

kamui

#!/usr/bin/env ruby

# Convert command line
#
#gm convert -font helvetica -fill white -pointsize 20 -draw "text 500,600 'WALLPAPERZ ARE GOOD'" test.jpg output.jpg
#
#convert -background transparent -fill white -gravity center -size 1024x200 -font Helvetica -pointsize 20 #caption:"I'm a wallpaper, you know what to do" test.jpg +swap -gravity south -composite output.jpg
#
# Mogrify command line
#

vjm

<%= form_for(@user) do |f| %>
  <% if @user.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@user.errors.count, "error") %> prohibited this user from being saved:</h2>

      <ul>
      <% @user.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>

rstacruz

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

samnang

# Change devise encryption strategy to match your existing authentication
# https://github.com/plataformatec/devise/tree/master/lib/devise/encryptors

class MigrateUsers < ActiveRecord::Migration
  def self.up
    rename_column :users, :crypted_password, :encrypted_password

    add_column :users, :confirmation_token, :string, :limit => 255
    add_column :users, :confirmed_at, :timestamp
    add_column :users, :confirmation_sent_at, :timestamp

riyad

# The BootstrapBreadcrumbsBuilder is a Bootstrap compatible breadcrumb builder.
# It provides basic functionalities to render a breadcrumb navigation according to Bootstrap's conventions.
#
# BootstrapBreadcrumbsBuilder accepts a limited set of options:
# * separator: what should be displayed as a separator between elements
#
# You can use it with the :builder option on render_breadcrumbs:
#     <%= render_breadcrumbs :builder => ::BootstrapBreadcrumbsBuilder, :separator => "&raquo;" %>
#
# Note: You may need to adjust the autoload_paths in your config/application.rb file for rails to load this class:

them0nk

#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD