dux

class Thread::Simple
  attr_accessor :que, :size, :named

  def initialize size: 5, sleep: 0.01
    @sync    = Mutex.new
    @sleep   = sleep
    @size    = size
    @que     = []
    @threds  = []
    @named   = {}

dux

# asciinema rec --overwrite tmp/demo.case
# bash demo.bash

type_and_run () {
  printf '\033[01;37m@app $\033[0m '
  for ((i=0; i<${#1}; i++)); do echo "after `jot -r 1  20 60`" | tclsh; printf "${1:$i:1}"; done;
  echo;
  $1;
  echo;
}

dux

# Defines class variable

def Object.class_attribute name, default=nil, &block
  raise ArgumentError.new('name must be symbol') unless name.class == Symbol

  ivar = "@cattr_#{name}"
  instance_variable_set ivar, block || default

  define_singleton_method(name) do |arg=:_undefined|
    # define and set if argument given

dux

# frozen_string_literal: true

class FolderModel

  class << self
    def find(key)
      new(key)
    end

    def all

dux

# Rails style callbacks

# for controllers, execute from AppController to MainController
# class_callback :before
# before do
#    ...
# end
# before :method_name
# instance = new
# Object.class_callback :before, instance

dux

# call just after body tag or $ -> window.MediaBodyClass.init()
# sets body class for
# mobile to  "mobile not-tablet not-desktop"
# tablet to  "not-mobile tablet not-desktop"
# desktop to "not-mobile not-tablet desktop"

@MediaBodyClass =
  sizes: [['mobile'], ['tablet', 767], ['desktop', 1023]]

  init: ->

dux

menu = HtmlMenu.new request.path

menu.add 'Home', '/'
menu.add 'People', '/people', lambda { |path| path.index('peor') }
menu.add 'Jobs', '/jbos'

menu.to_a -> [["Home", "/", false], ["People", "/people", true], ["Jobs", "/jbos", false]]
menu.to_h -> [{:name=>"Home", :path=>"/", :active=>true}, {:name=>"People", :path=>"/people", :active=>false}, {:name=>"Jobs", :path=>"/jbos", :active=>false}]

dux

CREATE USER readonly  WITH ENCRYPTED PASSWORD 'readonly';
GRANT USAGE ON SCHEMA public to readonly;
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readonly;

-- repeat code below for each database:

GRANT CONNECT ON DATABASE foo to readonly;
\c foo
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO readonly; --- this grants privileges on new tables generated in new database "foo"
GRANT USAGE ON SCHEMA public to readonly; 

dux

require 'sequel'
require 'securerandom'

# DB = Sequel.postgres(...)

ch_name = :test_1

Thread.new do
  DB.listen(ch_name, loop: true) do |channel, pid, payload|
    p [channel, pid, payload]

dux

# tag.ul do |n|
#   1.upto(3) do |num|
#     n.li do |n|
#       n.i 'arrow'              # <i class="arrow"></i>
#       n._arrow                 # <div class="arrow"></div>
#       n.span 123               # <span>123</span>
#       n.span { 123 }           # <span>123</span>
#       n.('foo')                # <div class="foo"></div>
#       n._foo(bar: baz) { 123 } # <div class="foo" bar="baz">123</div>
#     end