yuki24

class NullUser
  User.reflections.each do |key, value|
    name = key.to_s

    if value.collection?
      eval <<-RUBY
        def #{name}
          #{value.klass}.none
        end

yuki24

class ErrorPages < Ambulance::App

  # idea 0: rails' rescue_from
  rescue_from CanCan::AccessDenied, ActiveRecord::NotFound, ActionController::RoutingError do |exception|
    render file: 'public/404.html', status: :not_found, layout: false
  end

  # idea 1:
  routes ActiveRecord::NotFound,
         ActionController::RoutingError, to: 404

yuki24

# config/application.rb
config.exceptions_app = ->(env) { ErrorsController.action(:show).call(env) }

yuki24

BRANCH=0.16-stable; M=`git log --pretty=format:'%s' master | sort`; B=`git log --pretty=format:'%s' $BRANCH | sort`; diff <(echo "${MASTER}") <(echo "${B}") | grep "^>"

yuki24

class BaseNotifier < ActivePush::Base
  self.notifier_name = "base_notifier"

  default gcm: {collapse_key: '...', delay_while_idle: false},
    wp: {
      message_id: 'message id',
      notification_class: 'notification class',
      windowsphone_target: 'target'
    }

yuki24

class ApplicationController < ActionController::Base
  before_filter :override_request_formats

  def override_request_formats
    request.formats = [:json]
  end

  ...

end

yuki24

require 'benchmark/ips'

Benchmark.ips do |x|
  NEGATIVE = "-1"
  ZERO     = "0"
  ONE      = "1"
  TWO      = "2"

  x.report("Array#max ( -1)") { [NEGATIVE.to_i, 1].max - 1 }
  x.report("Array#max (  0)") { [    ZERO.to_i, 1].max - 1 }

yuki24

class Array
  def to_proc
    ->(obj) { obj[first] }
  end unless method_defined?(:to_proc)
end

users = [
  {name: "Matz"},
  {name: "DHH"},
  {name: "Yuki"}

yuki24

require 'benchmark/ips'

Benchmark.ips do |x|
  x.report "nothing" do
    [1, 2, 3]
  end

  x.report "#-" do
    [1, 2, 3] - [3]
  end

yuki24

Calculating -------------------------------------
           each_char   924.000  i/100ms
      each_codepoint     1.381k i/100ms
-------------------------------------------------
           each_char      9.320k (± 5.1%) i/s -     47.124k
      each_codepoint     13.857k (± 3.6%) i/s -     70.431k

Comparison:
      each_codepoint:    13857.4 i/s
           each_char:     9319.5 i/s - 1.49x slower