Janko Marohnić janko

Ruby developer, open source contributor, author of @shrinerb and rodauth-rails

janko / 01-intro.md

Last active August 29, 2015 14:22

Dynamic eager loading in JSON APIs (my presentation from our local Ruby meetups)

Dynamic eager loading

janko / 01-before.rb

Created May 27, 2015 22:41

Double dispatch in Ruby example (my presentation at a local Ruby meetup)

	module SocialPresenter

	# ...

	class Twitter < Struct.new(:object)

	def message
	case object
	when String

janko / 01-classic.rb

Created May 27, 2015 22:38

Controller refactoring (my presentation at a local Ruby meetup)

	#################
	# CLASSIC STYLE #
	#################

	class SessionsController < ApplicationController
	# ...

	def create
	if user = AuthenticateUser.call(params[:username], params[:password])
	sign_in!(user)

janko / 1-models.rb

Created May 27, 2015 17:50

Components of good application design (my presentation for a local Ruby meetup)

	# 1. Models (Entities)
	#
	# * The nouns of your business logic
	# * Usually persisted in the database
	# * Usually contain validations
	# * Usually expose associations with other models
	# * Usually have scopes (to encapsulate the query logic)

	################
	# ActiveRecord #

janko / benchmark.rb

Created May 19, 2015 23:17

Serialization performance

	gem "active_model_serializers", "0.10.0.rc1"

	require "yaks"
	require "active_record"
	require "active_model_serializers"
	require "benchmark/ips"

	ActiveRecord::Base.establish_connection(adapter: "postgresql", database: "testing")
	ActiveRecord::Schema.define do
	create_table :users, force: true do \|t\|

janko / 01-intro.md

Last active March 20, 2016 21:02

Yaks demonstration on the local Ruby meetup

You sometimes need to create an API
- You want frontend and backend separate
- You need REST API alongside the web app (GitHub, DNSimple, Travis)
JSON API specifications

janko / benchmark.rb

Last active August 29, 2015 14:18

Minitest loads *slower* than RSpec?

	require "benchmark/ips"

	File.write "minitest_test.rb", <<-EOS
	require "minitest/autorun"
	require "minitest/pride"

	class MintestTest < Minitest::Test
	def test_foo
	assert true
	end

janko / activerecord.rb

Created April 4, 2015 20:53

Sequel's vritual rows are awesome

	Movie.select(
	:year,
	"ts_headline(title, to_tsquery('#{query}'), 'StartSel = <strong>, StopSel = </strong>, HighlightAll = true') AS title",
	"ts_headline(plot, to_tsquery('#{query}'), 'StartSel = <strong>, StopSel = </strong>, HighlightAll = true') AS plot",
	"ts_headline(episode, to_tsquery('#{query}'), 'StartSel = <strong>, StopSel = </strong>, HighlightAll = true') AS episode"
	)

janko / keyword_arguments.rb

Last active July 24, 2018 08:34

Ruby keyword arguments advantages and use cases

	####
	# 1. Simple assertion of required arguments
	####
	# - You can forget #fetch
	# - You get a better error, and always on the line where method is defined

	def search(options = {})
	query = options.fetch(:query)
	end
	search() # => KeyError: key not found :query

janko / Gemfile

Last active August 29, 2015 14:13

Specifying dependencies: Java vs Ruby vs Node