warolv

git reset --soft HEAD^   -> undo last commit and save changes  
git reset --hard HEAD~1  -> undo last commit and remove changes
git reset --hard HEAD~2  -> undo 2 last commits and remove changes
git revert commit-hash  -> create new commit which reverts last commit
git checkout .  -> remove all uncommitted changes
git checkout filename -> undo changes in specific file
git clear -df  -> remove all untracked files
git rm filename -> remove file from index, after your did git add filename 
git commit --amend -> change message of last commit

warolv

rake db:migrate VERSION=20080906120000

rake db:rollback

rake db:migrate:redo STEP=3

rake db:migrate:up VERSION=20080906120000

rake db:migrate:down VERSION=20080906120000

warolv

class StaffController < ApplicationController
  respond_to :json

  def index
    respond_with Staff.all
  end

  def show
    respond_with Staff.find(params[:id])
  end

warolv

- if content_for?(:angular_module)
  = javascript_include_tag 'angular'
  = javascript_include_tag 'angular-resource'
  = javascript_include_tag 'angular-ui-bootstrap'
  = javascript_include_tag 'angular-sanitize'

warolv

$(document)
  .on('ajax:beforeSend', '#scheduling_options_form', function() {
    console.log('beforeSend');
    $('.ajax-loader').show();
  })
  .on('ajax:success', '#scheduling_options_form', function(data, status, xhr) {
    console.log('Success');
    $('.ajax-loader').hide();
  })
  .on('ajax:error', '#scheduling_options_form', function(data, status, xhr) {

warolv

 branding_logo_link: "To select branding logo for your business %{link:click}"

warolv

 branding_logo_link: "To select branding logo for your business %{text}"

warolv

Post.all.index_by { |post| post.id }
# => { 1 => #<Post ...>, 2 => #<Post ...>, ... }

Post.all.index_by(&:title)
# => { "My first post" => #<Post ...>, "My second post" => #<Post ...>, ... }

warolv

rake generate   # Generates posts and pages into the public directory
rake watch      # Watches source/ and sass/ for changes and regenerates
rake preview    # Watches, and mounts a webserver at http://localhost:4000
rake 'new_post["Building Form Ajax Validator"]' # Generate new post

# Create a new page
rake new_page[super-awesome]
rake new_page[super-awesome/page.html]

warolv

source 'https://rubygems.org'

ruby '2.0.0'
gem 'rails', '4.0.1'

group :production do
  gem 'pg'
  gem 'rails_12factor'
end