Kasvit

chrome

warp
https://www.warp.dev/

brew 
https://brew.sh/

dbngin (to install mysql, postgres)
https://dbngin.com/download

Kasvit

rails new my_app_name -d postgresql --skip-test

# Gemfile
gem 'slim'
gem "rubocop", require: false
gem "devise"

group :development, :test do
  gem "debug", platforms: %i[ mri windows ], require: "debug/prelude"
  gem "brakeman", require: false

Kasvit

************** Mapbox
1. Controller
  def find_us
    @geojson = build_geojson
  end
  
  private
  
  def build_geojson
    {

Kasvit

Normal: http://prntscr.com/lqkpkg
application.html.slim
doctype html
html
  head
    = yield(:header)
    = display_meta_tags site: 'Project management tool', reverse: true

New(only on this page): http://prntscr.com/lqkpzk
app/views/account/workspaces/list.html.slim

Kasvit

cat.rb

require 'singleton'

class Cat
  include Singleton

end

p Cat.instance

Kasvit

# 1) Create your private key (any password will do, we remove it below)

$ cd ~/.ssh
$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

Kasvit

http://www.cheat-sheets.org/saved-copy/RubyCheat.pdf



http://www.peachpit.com/articles/article.aspx?p=1278994&seqNum=2
https://quickleft.com/blog/five-ruby-methods-you-should-be-using/
https://callahan.io/blog/2014/07/17/five-useful-ruby-array-methods
https://launchschool.com/books/ruby/read/arrays#nestedarrays
# String
.concat OR + OR << 

Kasvit

5 прикладів belongs_to з різними опціями
https://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#method-i-belongs_to
10 методів ajax
5 прикладів has many з різними опціями


#  to generate random password
http://ruby-doc.org/stdlib-1.9.2/libdoc/securerandom/rdoc/SecureRandom.html
(0...8).map { (65 + rand(26)).chr }.join
(0...50).map { ('a'..'z').to_a[rand(26)] }.join

Kasvit

# rails caching
https://guides.rubyonrails.org/caching_with_rails.html
<% @products.each do |product| %>
  <% cache product do %>
    <%= render product %>
  <% end %>
<% end %>
<%= render partial: 'products/product', collection: @products, cached: true %>
class Product < ApplicationRecord
  has_many :games