wowremywang

import { createStore, applyMiddleware, compose } from "redux";
import rootReducer from "../reducers/index";
import { forbiddenWordsMiddleware } from "../middleware";

const storeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;

const store = createStore(
  rootReducer,
  storeEnhancers(applyMiddleware(forbiddenWordsMiddleware))
);

wowremywang

each_with_object

## Reference: https://womanonrails.com/each-with-object

# Bad
array = []
(1..10).each do |item|
  array << item ** 2
end
array

wowremywang

Rails.application.eager_load!
unused_routes = {}

# Iterating over all non-empty routes from RouteSet
Rails.application.routes.routes.map(&:requirements).reject(&:empty?).each do |route|
  name = route[:controller].camelcase
  next if name.start_with?("Rails")

  controller = "#{name}Controller"

wowremywang

# Bad
range = 1..Float::INFINITY
p range.collect { |x| x * x }.first(10)

# Good
range = 1..Float::INFINITY
p range.lazy.collect { |x| x * x }.first(10)

Reference: http://patshaughnessy.net/2013/4/3/ruby-2-0-works-hard-so-you-can-be-lazy

wowremywang

### Rails, ActiveRecord, query id in array of ints, keep order of passed array

# way 1
User.where(id: ids).sort_by { |u| ids.index(u.id) }

# way 2
User.where(id: ids).order("position(id::text in '#{ids.join(',')}')")

wowremywang

# Add data attribute to option
<%= select_tag :addon, options_for_select(@addons.map {|d| [d.name, d.sku, {'data-addon' => d.sku.downcase }]}) %>