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jQuery ->
  alert "hello"

$ ->
  alert "hello"

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# lib/custom_logger.rb
class CustomLogger < Logger
  def format_message(severity, timestamp, progname, msg)
    "#{timestamp.to_formatted_s(:db)} #{severity} #{msg}\n"
  end
end

logfile = File.open("#{Rails.root}/log/custom.log", 'a')  # create log file
logfile.sync = true  # automatically flushes data to file
CUSTOM_LOGGER = CustomLogger.new(logfile)  # constant accessible anywhere

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# from https://github.com/ruby-china/ruby-china/blob/master/app/helpers/application_helper.rb

MOBILE_USER_AGENTS =  'palm|blackberry|nokia|phone|midp|mobi|symbian|chtml|ericsson|minimo|' +
                    'audiovox|motorola|samsung|telit|upg1|windows ce|ucweb|astel|plucker|' +
                    'x320|x240|j2me|sgh|portable|sprint|docomo|kddi|softbank|android|mmp|' +
                    'pdxgw|netfront|xiino|vodafone|portalmmm|sagem|mot-|sie-|ipod|up\\.b|' +
                    'webos|amoi|novarra|cdm|alcatel|pocket|iphone|mobileexplorer|mobile'
def mobile?
agent_str = request.user_agent.to_s.downcase
return false if agent_str =~ /ipad/

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Override Devise RegistrationsController

Overview

Here I'll show you

• How to override devise registrations_controller(related to create/update user account)
• How to change redirect path after updating user

Override RegistrationsController

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require "mysql"

# more examples: 
# http://www.kitebird.com/articles/ruby-mysql.html

hostname = 'localhost'
username = 'yourname'
password = 'password'
database = 'mysql'
port = 3306

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# [RAILS_ROOT]/lib/tasks/sample.rake

desc "print hello world!"        # description.
task "hello_world" do            # rake task name.
   p "hello world!"                 # print "hello world!"
end

namespace :myapp do
  desc "import data from somewhere"
  # load rails environment

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; Ported from https://www.autohotkey.com/board/topic/1257-half-qwerty-one-handed-typing/
; Many thanks to Chris for helping me out with this script.

mirror_1 = 0
mirror_2 = 9
mirror_3 = 8
mirror_4 = 7
mirror_5 = 6
mirror_q = p
mirror_w = o

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require 'net/http'
require 'uri'

#1: Simple POST
res = Net::HTTP.post_form(URI.parse('http://www.example.com/search.cgi'),
                          {'q' => 'ruby', 'max' => '50'})
puts res.body

#2: POST with basic authentication
res = Net::HTTP.post_form(URI.parse('http://jack:pass@www.example.com/todo.cgi'),

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# in gemfile i have these lines
gem 'sitemap_generator', '2.0.1.pre1'
gem 'carrierwave'
gem 'fog'

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# in spec/support/omniauth_macros.rb
module OmniauthMacros
  def mock_auth_hash
    # The mock_auth configuration allows you to set per-provider (or default)
    # authentication hashes to return during integration testing.
    OmniAuth.config.mock_auth[:twitter] = {
      'provider' => 'twitter',
      'uid' => '123545',
      'user_info' => {
        'name' => 'mockuser',