Funky Ruby 🎉

Things you _can_ do in ruby, but _probably_ shouldn't let through code review

Transcript

1. ! ! Funky Ruby Things you can do in ruby, but probably shouldn't let through code review
2. _why the lucky stiff Try Ruby Why's (poignant) guide to Ruby (foxes!) Camping (microframework! < 4kb) Hpricot
3. Why Day 19th August Keep it fun, keep it weird
4. Key " - Useful, okay # - Sometimes useful, usually okay $ - Err, wtf㾗
5. " " String interpolation place = "plant" "We are in #{place}" # => "We are in plant"
6. # # String interpolation @place = "plant" "We are in #@place" # => "We are in plant"
7. # # String interpolation @pl = "pl" @ant = "ant" "We are in #@pl#@ant" # => "We are in plant"
8. $ $ String interpolation @p = "p" @l = "l" @a = "a" @n = "n" @t = "t" "We are in #@p#@l#@a#@n#@t" # => "We are in plant"
9. $ $ String interpolation %w(p l a n t).map { |c| instance_variable_set("@#{c}", c) } "We are in #@p#@l#@a#@n#@t" # => "We are in plant"
10. $ $ String interpolation %w(e h r).map { |c| instance_variable_set("@#{c}", c) } "We are #{"#@h#{"#{"#@e#{"#{"#@r#{"#{"#@e"}"}"}"}"}"}"}" # => "We are here"
11. " " String#% data = {name: "fred"} "I am %{name}" % data # => "I am fred"
12. # # Kernel#method (3..5).map { |n| n + 10 } # => [13, 14, 15] 10.method(:+) # => #<Method: Integer#+> (3..5).map(&10.method(:+)) # => [13, 14, 15]
13. " " Kernel#method Fence = Struct.new(:items) do def call items.map(&method(:fence_item)) end def fence_item(item) item.inspect end end
14. " " DATA require "yaml" YAML.load(DATA) # => ["Apples", "Crowbar", "Sink Plunger"] __END__ # Shopping List - Apples - Crowbar - Sink Plunger
15. " " DATA DATA.rewind print DATA.read __END__ something goes here
16. " " UTF-8 Ruby def  "Hi FreeAgent" end  # => "Hi FreeAgent"
17. " " UTF-8 Ruby : % # => : %
18. # # UTF-8 Ruby
19. $ $ UTF-8 Ruby class % end # => # ~> -:1: class/module name must be CONSTANT # ~> class % # ~> ^
20. $ $ UTF-8 Ruby % = Class.new # => #<Class:0x00007007> % .new # => #<#<Class:0x00007007>:0x00007fe3>
21. $ $ UTF-8 Ruby & = Struct.new(: ' , : ( ) & .new("Caius", "00770090000") # => #<struct ' ="Caius", ="00770090000">
22. $ $ Glitch text
23. " " default method args def greet(name = :default) return "Hello anon" if name == :default "Hello #{name}" end greet # => "Hello anon" greet "#nwrug" # => "Hello #nwrug" greet :default # => "Hello anon"
24. $ $ default method args def greet(name = (default = true; :default)) if default "HAI" elsif name == :default "No. ) " else " * #{name}" end end
25. $ $ default method args greet # => "HAI" greet "FreeAgent" # => "Hello FreeAgent" greet :default # => "No. "
26. Fin.