Ruby's Creed (RubyDay 2023, Verona)

Slide deck from my RubyDay 2023 presentation.

Transcript

2. Ciao!
5. First Ruby Conference since 2019!!!
7. Some things have changed…
8. Ruby 3 has landed!
9. Man City fi nally won the Champions League
10. Messi fi nally won the World Cup
11. Napoli fi nally won Serie A
14. Божидар
15. Bozhidar
16. Bozhidar
17. Bug cool
18. @bbatsov
19. Sofia, Bulgaria So fi a, Bulgaria
21. bbatsov
22. Ruby & Rails style guides
24. LSP support is coming!
26. batsov.com
27. metaredux.com
38. –Matz “I think a programming language should have a philosophy of helping our thinking, and so Ruby’s focus is on productivity and the joy of programming. If you feel comfortable with Ruby’s philosophy, that means Ruby is your language.”
39. Ruby’s Creed
41. Dictionary Definitions
42. Ruby
43. noun 1. a precious stone consisting of corundum in colour varieties varying from deep crimson or purple to pale rose. 2. a programming language optimised for programmer happiness
44. Creed
45. noun 1. a system of religious belief; a faith.
47. Motto
48. noun 1. a short sentence or phrase chosen as encapsulating the beliefs or ideals of an individual, family, or institution.
49. Motto by Example
50. There’s more than one way to do it. — Perl
51. Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. Flat is better than nested. Sparse is better than dense. Readability counts. Special cases aren't special enough to break the rules. Although practicality beats purity. — The Zen of Python
52. A programmer’s best friend. — ruby-lang.org
53. Ruby is optimised for programmer happiness. — Matz
55. A dynamic, open source programming language with a focus on simplicity and productivity. It has an elegant syntax that is natural to read and easy to write. — ruby-lang.org
57. Culture is the behaviours you reward and punish.
58. Culture is the things you do, not the things you say you’ll do.
59. Creed by Example
60. Clojure has never broken backwards compatibility.
61. Clojure favours a small library and changes/additions are made rarely.
62. 2129 commits in 14 years! (Clojure 1.0 was released in 2009)
63. In contrast, between 1.30 and 1.31, six weeks of development, Rust had 1,694 commits.
64. Between Ruby 3.1 and 3.2 5000+ commits were added
65. What is Programmer Happiness?
66. 5.times do puts 'Ruby rocks!' end
68. Happiness is something very subjective
70. (take 10 (filter even? (iterate inc 1)))
72. Happiness is individual
73. There’s more than one way to do it. — Perl
74. There’s more than one way to do it. — Ruby
75. core library method aliases
76. collect => map/filter inject => reduce detect => find select => find_all sprintf => format length => size raise => fail
77. map reduce find filter format length raise
78. Single-quoted & double-quoted string literals
80. Different hash literals • {:one => 1, :two => 2} • {one: 1, two: 2}
81. Plenty of “controversial” features • Flip- fl ops • For loops • Global variables • Magic arguments ($_) • Re fi nements • Optional static typing
82. Things I value • Simple and consistent syntax • Functional style of programming • Useful standard library • Backwards compatibility • Development tooling • Ecosystem (3rd party libraries, frameworks, etc) • Community
83. (Modern) Ruby Features I dislike • Ruby 1.9 hash literals • Re fi nements • %i literals • Rational/Complex literals (2/3r, 2+1i) • Endless ranges (1..) • Safe navigation operator (&.) • Static typing
84. Grading Recent Ruby Releases
85. Scores • 5 - a change that makes me very happy • 4 - a change that makes me happy • 3 - I’m ambivalent towards the change • 2 - a change that makes me unhappy • 1 - a change that makes me very unhappy
86. Ruby 2.7 • Pattern matching is added as an experimental feature (4/5) • Real keyword parameters (3/5) • Nice improvement, that creates a lot of maintenance overhead • Numbered block parameters - e.g. _1, _2 (2/5) • [10, 20, 30].map { _1**2 } • Beginless range - e.g. ..20 (2/5) • users.map(&:age).any?(...18)
87. # traditional Ruby [1, 2, 3].each { |i| puts i } (1..10).map { |i| i * 3 } (1..9).each_slice(3).map { |x, y, z| x + y + z } # Ruby 2.7 [1, 2, 3].each { puts @1 } (1..10).map { @1 * 3 } (1..9).each_slice(3).map { @1 + @2 + @3 }
88. h = Hash.new { |hash, key| hash[key] = "Go Fish: #{key}" } # vs h = Hash.new { @1[@2] = "Go Fish: #{@2}" }
89. Ruby 3.0 • Full separation of keyword arguments (3/5) • Moar maintenance pain for the sake of long-term gain • Ractors (3/5) • Non-blocking IO with Fibers (3/5) • Pattern matching is no longer experimental (4/5) • Endless methods (2/5) • def foo = bar
90. Ruby 3.1 • Hash literal value omission (2/5) • x, y = 1, 2; h = {x:, y:} • Anonymous block argument (2/5) • def filter(data, &)= data.select(&) • Pattern matching improvements (4/5)
91. Ruby 3.2 • Anonymous method argument (**) forwarding (4/5) • Better inspectable re fi nements (3/5) • Data class (4/5) • Set is now a built-in class (5/5) • Per- fi ber storage (3/5) • More pattern matching improvements (3/5)
92. No new features!
93. Shiny new stuff!
94. Too many new features!
95. I hate new stuff!
96. Ruby is mostly an object- oriented language…
97. That borrows a bit from functional programming
98. It’s dynamically typed
99. But now has optional static typing
102. Rails is an omakase.
103. Ruby is a la carte.
104. Ruby Style Guide & RuboCop
105. So, what is Ruby’s creed?
106. A language fl exible enough that most programmers would be (somewhat )happy with it
107. A language where the BDFL usually listens to the broader community
109. Grazie! twitter: @bbatsov github: @bbatsov https://metaredux.com https://emacsredux.com RubyDay 2023 Verona, Italy 16.06.2023
110. Feedback welcome!