flash-gordon

$ git branch -m master main
$ git commit -a -m 'Update CI config'
$ git push -u origin main

flash-gordon

-- users
select u.*
from   users u
where  u.id = 123
order by u.id;

-- books
select count(*) as b_cnt,
       b.user_id
from   books b

flash-gordon

class Operation
  extend Dry::Effects::Handler.Defer
  
  def run_long_something
    with_defer do
      transaction do
        DoSomeBusinessStuff.new.call
      end
    end
  end

flash-gordon

#!/bin/zsh
# initial code from https://github.com/denysdovhan/spaceship-prompt/blob/master/sections/git_status.zsh

#
# Git status
#


# ------------------------------------------------------------------------------
# Utils (from https://github.com/denysdovhan/spaceship-prompt/blob/master/lib/utils.zsh)

flash-gordon

slidenumbers: true slidecount: true code: auto(4), text-scale(1), Fira Code list: alignment(left), bullet-character(—)

[.slidenumbers: false]

---

[.slidenumbers: false]

flash-gordon

module Prelude
  class Monadic
    include Dry::Monads[:maybe, :result, :do]

    def call(id, item_id)
      users = [:user]
      items = []
      user, item = yield Maybe(users[id]).and(Maybe(items[item_id])).to_result {
        'User not found'
      }

flash-gordon

require 'continuation'

@cc = []

def backtrack(*choices)
  if @cc.empty?
    raise
  else
    @cc.pop.call
  end

flash-gordon

class SetSearchPath
  def initialize(app, rom)
    @app = app
    @connection = rom.gateways[:default].connection
  end
  
  def call(env)
    @connection.synchronize do
      @connection.execute("set seatch_path to #{env['tenant.schema_name']}")
      @app.call(env)

flash-gordon

puts "What's your name?"
name = gets
puts "Hello #{name}"

flash-gordon

begin
  puts "What's your name?"
  name = gets
  puts "Hello #{name}"
rescue Read => err
  err.continue("foobar")
rescue Write => err
  err.continue
end