Ricardo Oliveira rcoproc

Texto original em Inglês: https://gist.github.com/rondy/af1dee1d28c02e9a225ae55da2674a6f

FWIW: Eu não produzi o conteúdo apresentado aqui (o esboço do livro de Edmond Lau). Acabei de copiar e colar de algum lugar da Internet, mas não me lembro qual é exatamente a fonte original. Também não consegui encontrar o nome do autor, por isso não posso lhe dar os devidos créditos. *

Engenheiro Eficaz(The Effective Engineer) - Notas

Por Edmond Lau
Altamente recomendado: +1:

Dynamic Dispatch
Dynamic Method
Ghost Methods
Dynamic Proxies
Blank Slate
Kernel Method
Flattening the Scope (aka Nested Lexical Scopes)
Context Probe
Class Eval (not really a 'spell' more just a demonstration of its usage)
Class Macros

Single responsibility principle

"Em outras palavras, todas as classes complicadas devem ser divididas em classes menores, responsáveis por um comportamento específico, facilitando o entendimento e a manutenção da base de código." https://rubygarage.org/blog/solid-principles-of-ood

Probably the most well known principle, and one that should try to adhere to most of the time.

Let's say you have this code:

Comparativo Elixir x Ruby (Elixir Ruby comparation)

https://elixir-examples.github.io/examples/elixir-and-ruby-comparison

Exemplos em Elixir (Elixir Examples)

https://elixir-examples.github.io/

Elixir tips

https://github.com/blackode/elixir-tips

Create a new rails 6 app with postgresql and heroku deployment

Before we begin

You will need rails 6 installed. GoRails is the best resource I have found to date.
You will need the heroku cli tool installed.
You will need NodeJS installed: https://nodejs.org/en/download/

Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

Various ways to remove local Git changes

how-do-i-discard-unstaged-changes-in-git

If you want to revert changes made to your working copy, do this

git checkout .

	## GAE
	From GcpAppEngineServiceSample SELECT latest(flex.cpu.Utilization), latest(flex.cpu.ReservedCores) WHERE entityName LIKE 'integration-auth.%'
	From GcpAppEngineServiceSample SELECT latest(system.memory.UsageBytes), latest(system.Instances) WHERE entityName LIKE 'integration-auth.%'
	From GcpAppEngineServiceSample SELECT latest(system.memory.UsageBytes / 1e9), latest(system.Instances) WHERE entityName LIKE 'integration-auth.%'/B

	## Transactions
	From transaction select count(****) where appName = 'Integration Auth (Production)'
	from transaction select count(*) where appName = 'Integration Auth (Production)' timeseries
	from transaction select count(*) where appName = 'Integration Auth (Production)' timeseries compare with 1 week ago
	from transaction select count(*) where appname = 'Integration Auth (Production)' timeseries facet request.method

	# Json API Tests
	# Para o código abaixo funcionar temos que configuras seguintes GEMS:
	# gem 'rspec-json_expectations' # Utilizado no helper include_json
	# gem 'json_matchers' # Utilizado pelo helper match_response_schema ...

	require 'rails_helper'

	RSpec.describe "Customers", type: :request do
	describe "GET /customers" do

	# ---- Build Stage ----
	FROM erlang:22-alpine AS app_builder

	# Set environment variables for building the application
	ENV MIX_ENV=prod \
	TEST=1 \
	LANG=C.UTF-8

	# Fetch the latest version of Elixir (once the 1.9 docker image is available you won't have to do this)
	RUN set -xe \