What I Learned to Love About Ruby When I Switched To Python

June 24, 2017: GORUCO 2017

Transcript

1. What I Learned to Love About Ruby When I Switched to Python Lauren Ellsworth June 24, 2017 GORUCO!
2. Lauren Ellsworth @redyaffle Senior Software Engineer Flatiron Health lauren@flatiron.com www.thefourthparty.com flatiron.engineering
5. “Each [language] contains a way of perceiving, categorizing, and making meaning in the world…” How Language Shapes Thought by Lera Boroditsky
6. • Principle of Least Surprise • Version management • Defaults and their consequences • Philosophy
7. The Principle of Least Surprise
8. “Ruby should behave how you’d expect it to. This is easily described with a contrast to Python: $ irb irb(main):001:0> exit $ irb irb(main):001:0> quit $ python >>> exit Use exit() or Ctrl-D (i.e. EOF) to exit The Rails Doctrine, by David Heinemeier Hansson
9. “The principle of least surprise is not for you only. The principle of least surprise means principle of least my surprise. And it means the principle of least surprise after you learn Ruby very well.” A Conversation with Yukihiro Matsumoto, Part I
11. The Rails Doctrine, by David Heinemeier Hansson “Matz jumped implementational hurdles of astounding complexity to make the machine appear to smile at and flatter its human co-conspirator.”
14. Ruby Doc 2.4.1: Enumerable
16. • Principle of Least Surprise aka safely ignoring whitespace. & not being an exact memorizer.
17. Version Management
18. 2008 2020 July 2010: Python 2.7.0 Dec 2016: Python 2.7.13 Dec 2008: Python 3.0.0 Mar 2017: Python 3.6.1 Apr 2020: Python 2 EOL Mar 2017: Ruby 2.3.4 Dec 2014: Ruby 2.2.0 Feb 2013: Ruby 2.0.0 Apr 2017: Ruby 2.2.0 Enters security support
19. python-clock-g uido Python Clock
22. py
25. django-pip-free ze
26. • Version Management aka lots of rubies, and all of their dependencies living happily side by side
27. Defaults and their consequences
28. “...defaults make a difference.” Do Defaults Save Lives? Eric J. Johnson and Daniel Goldstein
29. Do Defaults Save Lives? Eric J. Johnson and Daniel Goldstein
32. Getting Started With Rails
33. $ history 1 ruby -v # 2.3.1p112 2 sqlite3 --version # 3.16.0 3 rails --version # Rails 5.1.1 4 rails new blog 5 cd blog/ 6 bin/rails server 7 rails generate controller Welcome index 8 vim . # Hello, Rails! editing 9 rails generate controller Articles 10 vim . # New articles_controller methods 11 rake routes # Inspect routes 12 rails generate model Article title:string text:text 13 rails db:migrate 14 bin/rails server # Restart rails server
39. Writing Your First Django App
40. $ history 1 python --version # 3.6.1 2 sqlite3 --version # 3.16.0 3 python -m Django --version # 1.11.2 4 django-admin startproject mygorucosite 5 cd mygorucosite/ 6 python manage.py runserver
42. Stack Overflow: Disallowed Host at Django
44. $ history 1 python --version # 3.6.1 2 sqlite3 --version # 3.16.0 3 python -m Django --version # 1.11.2 4 django-admin startproject mygorucosite 5 cd mygorucosite/ 6 python manage.py runserver 7 vim . # Edit ALLOWED_HOSTS 8 python manage.py startapp polls 9 python manage.py makemigrations polls 10 python manage.py sqlmigrate polls 0001 11 python manage.py migrate 12 python manage.py createsuperuser 13 vim . # Edit polls/view, mysite/urls.py, polls/urls.py, settings.py 14 python manage.py runserver
48. environment information ✔ basic instructions ✔ timestamped lines ✔ web requests ✔ ✔ web parameters ✔ render timing ✔ database interactions ✔ database parameters ✔ database timing ✔ controllers / methods used ✔ server reloads ✔
49. “consider that every policy must have a no-action default” Do Defaults Save Lives? Eric J. Johnson and Daniel Goldstein
50. • Defaults and their consequences aka training beginners with principles that (I personally think) are valuable
51. Philosophy
52. Lost in Translation by Lera Boroditsky “Patterns in language offer a window on a culture’s dispositions and priorities.”
53. Yukihiro Matsumato Guido van Rossum Photo from alchetron.com Photo from Workspiration
54. MINASWAN Matz is nice and so we are nice BDFL Benevolent Dictator for Life
55. MINASWAR Matz is nice and so we are nice and so we are respectful BDFL Benevolent Dictator for Life
56. the joy of Ruby the zen of Python
57. Why's Poignant Guide to Ruby
58. XKCD #353
59. • Philosophy aka being super welcoming and having fun
60. • Principle of Least Surprise • Version Management • Defaults and their consequences • Philosophy
61. Systems Administration Web Development Data Processing
62. Photo by Martin Katz Jewelry
63. Lauren Ellsworth @redyaffle Senior Software Engineer Flatiron Health lauren@flatiron.com www.thefourthparty.com flatiron.engineering