Succession

Refactoring sometimes devolves into an appalling mess. You're chasing a broken test suite, and every change just makes it worse. At other times it's a slow, controlled process culminating in dreadful design.

This talk presents an end-to-end refactoring that demonstrates simple strategies to avoid such misadventures.

Transcript

1. TVDDFTTJPO A Refactoring Story in Ruby Katrina Owen @kytrinyx http://exercism.io
2. I know an old lady who swallowed a . fly
3. I know an old lady who swallowed a . spider She swallowed the spider to catch the fly.
4. I know an old lady who swallowed a . bird She swallowed the bird to catch the spider. She swallowed the spider to catch the fly.
5. I know an old lady who swallowed a . cat She swallowed the cat to catch the bird. She swallowed the bird to catch the spider. She swallowed the spider to catch the fly.
6. I know an old lady who swallowed a . dog She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider. She swallowed the spider to catch the fly.
7. I know an old lady who swallowed a . goat She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider. She swallowed the spider to catch the fly.
8. I know an old lady who swallowed a . cow She swallowed the cow to catch the goat. She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider. She swallowed the spider to catch the fly.
9. I know an old lady who swallowed a . horse
10. EFBE
    PG
    DPVSTF 4IFT
11. / %@. @# @@@@( (@. ,@@@@@@@@, ,@% #@@@@@@@@@@@ .@& (@@@@@@@@@@@@@% @@( *@@@@@@@@@@@@@@@ (@@/ ,@@@@@@@@@@@@@@@@@, @/ @@@, %@@@@@@@@@@@@@@@@@@/ &@( &@@@ @@@@@@@@@@@@@@@@@@@@# &@/ @@@@. @@@@@@@@@@@@@@@@@@@@@/ &@# ,@@@( /@@@@@@@@@@@@@@@@@@@@@, %@& (@@, @@@. #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ &@@. @@/ /@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&/ &@@% /@@, %@@@@@@@@@@@@@@@@@@@@@@@@@/ %@@@. %@@* .@@@@@@@@@@@@@@@@@@@@@@@@@@@ %@@@/ @@@, &@@@@@@@@@@@@@@@@@@@@@@@@@@@& ./(%##////#. ,@@@@@@,,,.,.,.... ,@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@& *&@@@@@@@@@@@@@@@@@#. @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@# .&@@@@@& @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@/ /@@@@@&@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@# /@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@# ,,. #@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@* %@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&(*. (%%%&@&&@@@@ (@@@* /@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@* &@@@@@, . (@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@& ,@@@@* *@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@( *@@@& @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@/ #, &@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@. ,%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@&, /@@#&@@@@@@@& ,#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@% *@@@@@@@@@@@@@ @@@@ ,@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@( .(@@@@@@@@% .@@@& (@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ,@@@% &@@@@/,(#@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@. (@@@ #@@@@# .*,(@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@/ (@@@ @@@@ .,(#%&&@@@@@@@@@@@@@@@@@, *@@@% .@@@, .,*(##(*, ,@@@@@@/ @@@(. .@@@@( /@@@@@@&%((/, *@@@@ .*#&@@@@@@/ .@@@& ,@@&, *@@( (@@@. (@& *&% /@# /@. *@. %*
12. What a hog, to swallow a dog! She swallowed the dog to catch the She swallowed the cat to catch the She swallowed the bird to catch th She swallowed the spider to catch I don't know why she swallowed the I know an old lady who swallowed a Just opened her throat and swallow
13. <<-SONG I know an old lady who swallowed a fly. # ... She's dead, of course! SONG
14. def lyrics <<-SONG I know an old lady who swallowed a fly. # ... She's dead, of course! SONG end
15. class Song def lyrics <<-SONG I know an old lady who swallowed a fly. # ... She's dead, of course! SONG end end
16. JO
    UIF
    CFHJOOJOH
17. OPQF
18. BOE
    TP
    JU
    CFHJOT
19. OPQF
20. class SongTest < Minitest::Test def test_lyrics <<-SONG I know an old lady who swallowed a fly. # ... She's dead, of course! SONG end end
21. class SongTest < Minitest::Test def test_lyrics expected = <<-SONG I know an old lady who swallowed a fly. # ... She's dead, of course! SONG assert_equal expected, Song.new.song end end
22. PODF
    VQPO
    B
    UJNF
23. OPQF
24. SFGBDUPS
25. It wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll I know an old lady who swallowed a bird. How absurd to swallow a bird! She swallowed the bird to catch the spider that wriggle She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll I know an old lady who swallowed a cat. Imagine that, to swallow a cat! She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggle She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll
26. EVQMJDBUJPO
27. # ... I know an old lady who swallowed a fly. # ... I know an old lady who swallowed a spider. # ... I know an old lady who swallowed a bird. # ... I know an old lady who swallowed a cat. # ... I know an old lady who swallowed a dog. # ... I know an old lady who swallowed a goat. # ... I know an old lady who swallowed a cow. # ... I know an old lady who swallowed a horse. # ...
28. # ... She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and She swallowed the spider to catch the fly. # ... She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and She swallowed the spider to catch the fly. # ... She swallowed the cow to catch the goat. She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and
29. I know an old lady who swallowed a dog. What a hog, to swallow a dog! She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a goat. Just opened her throat and swallowed a goat! She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die.
30. <<-SONG I know an old lady who swallowed a fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a spider. It wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a bird. How absurd to swallow a bird! She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a cat. Imagine that, to swallow a cat! She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a dog. What a hog, to swallow a dog! She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a goat. Just opened her throat and swallowed a goat! She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a cow. I don't know how she swallowed a cow! She swallowed the cow to catch the goat. She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a horse. She's dead, of course! SONG
31. JOEJSFDUJPO
32. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps...\n" when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps...\n" when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that..." + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps...\n" when 4
33. (1..8).map {|i| case i when 1 # ... when n # ... end }.join("\n")
34. def lyrics (1..8).map {|i| case i when 1 # ... when n # ... end }.join("\n") end
35. def song (1..8).map {|i| case i when 1 # ... when n # ... end }.join("\n") end
36. def song (1..8).map {|i| verse(i) }.join("\n") end
37. private def verse(i) case i when 1 # ... when n # ... end end
38. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that wrigg "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l
39. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that wrigg "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l
40. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that wrigg "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l
41. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that wrigg "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'l
42. UFNQMBUF
    
    EBUB
43. "template vs data"
44. "template vs %s" % "data"
45. "template vs %s" % "data"
46. "template vs %s" % "data"
47. "template vs %s" % "data"
48. "%s vs template" % "data"
49. "template vs %s" % "data"
50. "template vs %s" % "data"
51. case i when 1 "I know an old lady who swallowed a fly.\n" when 2 "I know an old lady who swallowed a spider.\n" when 3 "I know an old lady who swallowed a bird.\n" when 4 "I know an old lady who swallowed a cat.\n" when 5 "I know an old lady who swallowed a dog.\n" when 6 "I know an old lady who swallowed a goat.\n" when 7 "I know an old lady who swallowed a cow.\n" when 8 "I know an old lady who swallowed a horse.\n" end
52. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" when 2 "I know an old lady who swallowed a %s.\n" % "spider" when 3 "I know an old lady who swallowed a %s.\n" % "bird" when 4 "I know an old lady who swallowed a %s.\n" % "cat" when 5 "I know an old lady who swallowed a %s.\n" % "dog" when 6 "I know an old lady who swallowed a %s.\n" % "goat" when 7 "I know an old lady who swallowed a %s.\n" % "cow" when 8 "I know an old lady who swallowed a %s.\n" % "horse" end
53. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" when 2 "I know an old lady who swallowed a %s.\n" % "spider" when 3 "I know an old lady who swallowed a %s.\n" % "bird" when 4 "I know an old lady who swallowed a %s.\n" % "cat" when 5 "I know an old lady who swallowed a %s.\n" % "dog" when 6 "I know an old lady who swallowed a %s.\n" % "goat" when 7 "I know an old lady who swallowed a %s.\n" % "cow" when 8 "I know an old lady who swallowed a %s.\n" % "horse" end
54. "She swallowed the bird to catch the spider that wrig "She swallowed the spider to catch the fly.\n" + when 6 "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wrig "She swallowed the spider to catch the fly.\n" + when 7 "She swallowed the cow to catch the goat.\n" + "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wrig "She swallowed the spider to catch the fly.\n" + when 8
55. "She swallowed the %s to catch the %s.\n" % ["bird", "She swallowed the %s to catch the %s.\n" % ["spider when 6 "She swallowed the %s to catch the %s.\n" % ["goat", "She swallowed the %s to catch the %s.\n" % ["dog", "She swallowed the %s to catch the %s.\n" % ["cat", "She swallowed the %s to catch the %s.\n" % ["bird", "She swallowed the %s to catch the %s.\n" % ["spider when 7 "She swallowed the %s to catch the %s.\n" % ["goat", "She swallowed the %s to catch the %s.\n" % ["dog", "She swallowed the %s to catch the %s.\n" % ["cat", "She swallowed the %s to catch the %s.\n" % ["bird", "She swallowed the %s to catch the %s.\n" % ["spider "She swallowed the %s to catch the %s.\n" % ["spider when 8
56. "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
57. % "cow" + % "I don't know how she swallowed a cow!" + % ["cow", "goat"] + % ["goat", "dog"] + % ["dog", "cat"] + % ["cat", "bird"] + % ["bird", "spider that wriggled and..."] + % ["spider", "fly"] + % "I don't know why she swallowed the fly...
58. <<-SONG I know an old lady who swallowed a fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a spider. It wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a bird. How absurd to swallow a bird! She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a cat. Imagine that, to swallow a cat! She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a dog. What a hog, to swallow a dog! She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a goat. Just opened her throat and swallowed a goat! She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a cow. I don't know how she swallowed a cow! She swallowed the cow to catch the goat. She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a horse. She's dead, of course! SONG
59. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 4 "I know an old lady who swallowed a cat.\n" + "Imagine that, to swallow a cat!\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 5 "I know an old lady who swallowed a dog.\n" + "What a hog, to swallow a dog!\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 6 "I know an old lady who swallowed a goat.\n" + "Just opened her throat and swallowed a goat!\n" + "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 7 "I know an old lady who swallowed a cow.\n" + "I don't know how she swallowed a cow!\n" + "She swallowed the cow to catch the goat.\n" + "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 8 "I know an old lady who swallowed a horse.\n" + "She's dead, of course!\n" end
60. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "She swallowed the %s to catch the %s.\n" % ["cow", "goat"] + "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end
62. BMHPSJUIN
63. case i when 1 "I know an old lady who swallowed a %s.\n" % "%s\n" %
64. case i when 2 "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
65. case i when 3 "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
66. case i when 4 "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
67. case i when 5 "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
68. case i when 6 "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
69. case i when 7 "I know an old lady who swallowed a %s.\n" % "%s\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "She swallowed the %s to catch the %s.\n" % "%s\n" %
70. case i when 8 "I know an old lady who swallowed a %s.\n" % "%s\n" %
71. "She swallowed the %s to catch the %s"
72. "She swallowed the %s to catch the %s" * n
73. "She swallowed the %s to catch the %s" % [predator, prey]
74. "She swallowed the %s to catch the %s." % [ predator, prey, ]
75. def swallow(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
76. def to_catch(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
77. def blue "FF0000" end
78. "She swallowed the %s to catch the %s." % [ predator, prey, ]
79. def recurring_line(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
80. def incremental_sentence(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
81. def middle_phrase(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
82. "She swallowed the %s to catch the %s." % [ predator, prey, ]
83. def reasoning(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
84. def why(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
85. def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
86. ["cow", "goat"] ["goat", "dog"] ["dog", "cat"] ["cat", "bird"] ["bird", "spider"] ["spider", "fly"]
87. ["cow", "goat"] ["goat", "dog"] ["dog", "cat"] ["cat", "bird"] ["bird", "spider"] ["spider", "fly"]
88. ["cow", "goat"] ["goat", "dog"] ["dog", "cat"] ["cat", "bird"] ["bird", "spider"] ["spider", "fly"]
89. ["cow", "goat"] ["goat", "dog"] ["dog", "cat"] ["cat", "bird"] ["bird", "spider"] ["spider", "fly"]
90. ["cow", "goat"] ["goat", "dog"] ["dog", "cat"] ["cat", "bird"] ["bird", "spider"] ["spider", "fly"]
91. ["cow", "goat"] ["goat", "dog"] ["dog", "cat"] ["cat", "bird"] ["bird", "spider"] ["spider", "fly"]
92. ["cow", "goat", "dog", ...]
93. [...].each_cons(2)
94. ["cow", "goat", "dog", "cat", "bird", ...]
95. critters.each_cons(2).map {|pair| motivation(*pair) }
96. critters.each_cons(2).map {|pair| motivation(*pair) }
97. critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n")
98. def sequence(critters) critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end
99. def chain(critters) critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end
100. food chain B
     IJFSBSDIJDBM
     TFSJFT
     PG
     PSHBOJTNT
     FBDI
     EFQFOEFOU
     PO
     UIF
     OFYU
     BT
     B
     TPVSDF
     PG
     GPPE
101. def chain(critters) critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
102. "She swallowed the cow to catch the goat.\n" + "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider.\n" + "She swallowed the spider to catch the fly.\n" +
103. def chain(critters) critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
105. BOPNBMZ
106. She swallowed the cow to catch the goat. She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly.
107. if prey == "spider" # ... else # ... end
108. EJGGFSFODF
109. if prey == "spider" "She swallowed [...] that wriggled [...]." else "She swallowed [...]." end
110. if prey == "spider" "She swallowed [...] that wriggled [...]." else "She swallowed [...]." end
111. if prey == "spider" "She swallowed [...] that wriggled [...]." else "She swallowed [...]." end
112. if prey == "spider" "She swallowed [...] that wriggled [...]." else "She swallowed [...]." end
113. if prey == "spider" " that wriggled [...]" else ??? end
114. if prey == "spider" " that wriggled [...]" end
115. TZNNFUSZ
116. if prey == "spider" " that wriggled..." else "" end
117. def distinctive_features if prey == "spider" " that wriggled..." else "" end end
118. def qualifier if prey == "spider" " that wriggled..." else "" end end
119. if prey == "spider" " that wriggled..." end
120. def spider_tag if prey == "spider" " that wriggled..." end end
121. def qualifier if prey == "spider" " that wriggled..." else "" end end
122. def qualifier(prey) if prey == "spider" " that wriggled..." else "" end end
123. def qualifier(critter) if critter == "spider" " that wriggled..." else "" end end
124. qualifier(critter)
125. critter.qualifier
126. class Critter < Struct.new(:name, :qualifier) end
127. class Song DATA = [ ] end
128. class Song DATA = [ ["horse"], ["cow"], ["goat"], ["dog"], ["cat"], ["bird"], ["spider", "that wriggled ..."], ["fly"], ] end
129. class Song DATA = [...] attr_reader :critters def initialize @critters = DATA.map {|row| Critter.new(*row) } end end
130. def motivation(predator, prey) # ... end
131. def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, [ prey.name, prey.qualifier, ].compact.join(" "), ] end
132. class Critter < Struct.new(:name, :qualifier) end class Song # ... def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, [ prey.name, prey.qualifier, ].compact.join(" "), ] end # ... end
133. def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, [ prey.name, prey.qualifier, ].compact.join(" "), ] end
134. def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator, prey, ] end
135. def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, [ prey.name, prey.qualifier, ].compact.join(" "), ] end
136. def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, [ prey.name, prey.qualifier, ].compact.join(" "), ] end TMI
137. [ critter.name, critter.qualifier ].compact.join(" ")
138. def epithet(critter) [ critter.name, critter.qualifier ].compact.join(" ") end
139. def epithet(critter) [ critter.name, critter.qualifier ].compact.join(" ") end
140. class Critter < Struct.new(:name, :qualifier) def epithet [ name, qualifier ].compact.join(" ") end end
142. "%s\n" % "I don't know why she swallowed the fly. when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggle "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggle "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a g "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggle
143. "%s\n" % "I don't know why she swallowed the fly. when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggle "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggle "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a g "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggle
144. "%s\n" % "I don't know why she swallowed the fly. when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "%s\n" % chain(4) + "%s\n" % "I don't know why she swallowed the fly. when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why she swallowed the fly. when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a g "%s\n" % chain(6) + "%s\n" % "I don't know why she swallowed the fly. when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why she swallowed the fly. when 8 "I know an old lady who swallowed a %s.\n" % "horse" +
145. # Running: . 1 assertions, 0 failures, 0 errors, 0 skips
146. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "She swallowed the %s to catch the %s.\n" % ["cow", "goat"] + "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end
147. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "%s\n" % chain(2) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "%s\n" % chain(3) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "%s\n" % chain(4) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end
148. class Critter < Struct.new(:name, :qualifier) def epithet [name, qualifier].compact.join(" ") end end class Song DATA = [ ["horse"], ["cow"], ["goat"], ["dog"], ["cat"], ["bird"], ["spider", "that wriggled and jiggled and tickled inside her"], ["fly"], ] attr_reader :critters def initialize @critters = DATA.map {|row| Critter.new(*row)} end def lyrics (1..8).map {|i| verse(i)}.join("\n") end private def chain(i) critters.last(i).each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end # ... end class Song # continued ... def verse(i) case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "%s\n" % chain(2) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "%s\n" % chain(3) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "%s\n" % chain(4) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end end end
149. TJNJMBSJUZ
150. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why..." when 8
151. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why..." when 8
152. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why..." when 8
153. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
154. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
155. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
156. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
157. critters.last(i).first
158. critters.last(i).first.name
159. when 5 "I know an old lady..." % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
160. when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
161. when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
162. when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why..." when 8
163. I know an old lady who swallowed a . fly I don't know why she swallowed a fly. Perhaps she'll die.
164. I know an old lady who swallowed a . spider It wriggled and jiggled and tickled inside her.
165. I know an old lady who swallowed a . bird How absurd to swallow a bird!
166. I know an old lady who swallowed a . cat Imagine that, to swallow a cat!
167. I know an old lady who swallowed a . dog What a hog, to swallow a dog!
168. I know an old lady who swallowed a . goat Just opened her throat and swallowed a goat!
169. I know an old lady who swallowed a . cow I don't know how she swallowed a cow!
170. I know an old lady who swallowed a . horse She's dead, of course!
171. critter.aside
172. class Song DATA = [ ["horse"], ["cow"], ["goat"], ["dog"], ["cat"], ["bird"], ["spider", "that wriggled ..."], ["fly"], ] end
173. class Song DATA = [ ["horse", nil, "She's dead, of course!"], ["cow", nil, "I don't know how..."], ["goat", nil, "Just opened her throat..."], ["dog", nil, "What a hog, to swallow a dog!"], ["cat", nil, "Imagine that, to swallow a cat!"], ["bird"], ["spider", "that wriggled...", "It wriggled..."], ["fly", nil, "I don't know why..."], ] end
174. when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 8
175. when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 8
176. when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly..." when 8
177. when 4 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8
178. case i when 1, 8 "I know an old lady..." % critters.last(i).first.name + "%s\n" % "I don't know why she swallowed the fly. Perhaps..." else "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps..." end
180. <<-SONG I know an old lady who swallowed a fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a spider. It wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a bird. How absurd to swallow a bird! She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a cat. Imagine that, to swallow a cat! She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a dog. What a hog, to swallow a dog! She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a goat. Just opened her throat and swallowed a goat! She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a cow. I don't know how she swallowed a cow! She swallowed the cow to catch the goat. She swallowed the goat to catch the dog. She swallowed the dog to catch the cat. She swallowed the cat to catch the bird. She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her. She swallowed the spider to catch the fly. I don't know why she swallowed the fly. Perhaps she'll die. I know an old lady who swallowed a horse. She's dead, of course! SONG
181. case i when 1 "I know an old lady who swallowed a fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 2 "I know an old lady who swallowed a spider.\n" + "It wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 3 "I know an old lady who swallowed a bird.\n" + "How absurd to swallow a bird!\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 4 "I know an old lady who swallowed a cat.\n" + "Imagine that, to swallow a cat!\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 5 "I know an old lady who swallowed a dog.\n" + "What a hog, to swallow a dog!\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 6 "I know an old lady who swallowed a goat.\n" + "Just opened her throat and swallowed a goat!\n" + "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 7 "I know an old lady who swallowed a cow.\n" + "I don't know how she swallowed a cow!\n" + "She swallowed the cow to catch the goat.\n" + "She swallowed the goat to catch the dog.\n" + "She swallowed the dog to catch the cat.\n" + "She swallowed the cat to catch the bird.\n" + "She swallowed the bird to catch the spider that wriggled and jiggled and tickled inside her.\n" + "She swallowed the spider to catch the fly.\n" + "I don't know why she swallowed the fly. Perhaps she'll die.\n" when 8 "I know an old lady who swallowed a horse.\n" + "She's dead, of course!\n" end
182. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "She swallowed the %s to catch the %s.\n" % ["cow", "goat"] + "She swallowed the %s to catch the %s.\n" % ["goat", "dog"] + "She swallowed the %s to catch the %s.\n" % ["dog", "cat"] + "She swallowed the %s to catch the %s.\n" % ["cat", "bird"] + "She swallowed the %s to catch the %s.\n" % ["bird", "spider that wriggled and jiggled and tickled inside her"] + "She swallowed the %s to catch the %s.\n" % ["spider", "fly"] + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end
183. def verse(i) case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "%s\n" % chain(2) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "%s\n" % chain(3) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "%s\n" % chain(4) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end end def chain(i) critters.last(i).each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end
184. class Critter < Struct.new(:name, :qualifier, :aside) def epithet [name, qualifier].compact.join(" ") end end
185. case i when 1 "I know an old lady who swallowed a %s.\n" % "fly" + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 2 "I know an old lady who swallowed a %s.\n" % "spider" + "%s\n" % "It wriggled and jiggled and tickled inside her." + "%s\n" % chain(2) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % "bird" + "%s\n" % "How absurd to swallow a bird!" + "%s\n" % chain(3) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % "cat"+ "%s\n" % "Imagine that, to swallow a cat!" + "%s\n" % chain(4) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % "dog" + "%s\n" % "What a hog, to swallow a dog!" + "%s\n" % chain(5) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % "goat" + "%s\n" % "Just opened her throat and swallowed a goat!" + "%s\n" % chain(6) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % "cow" + "%s\n" % "I don't know how she swallowed a cow!" + "%s\n" % chain(7) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % "horse" + "%s\n" % "She's dead, of course!" end
186. case i when 1 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside when 2 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 3 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 4 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 5 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 6 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 7 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." when 8 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside end
187. case i when 1, 8 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside else "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain(i) + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end
188. DPIFTJPO
189. class Song def initialize # ... def lyrics # ... private def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
190. class Song def initialize # ... def lyrics # ... private def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
191. class Song def initialize # ... def lyrics # ... end class Verse def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
192. class Song def initialize # ... def lyrics # ... private def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end class Verse # ... end
193. class Verse def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
194. critters.last(i)
195. class Verse def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
196. class Verse def initialize(critters) # ... def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
197. class Verse attr_reader :critters def initialize(critters) # ... def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
198. Verse.new(critters)
199. Verse.new(critters.last(i))
200. class Verse attr_reader :critters def initialize(critters) # ... def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
201. class Verse attr_reader :critters def initialize(critters) # ... def verse # ... def chain # ... def motivation(predator, prey) # ... end
202. class Verse attr_reader :critters, :i def initialize(critters) @critters = critters @i = critters.length end # ... end
203. Verse.new(critters.last(i)).verse
204. Verse.new(critters.last(i)).to_s
205. class Verse attr_reader :critters, :i def initialize(critters) # ... def to_s # ... def chain # ... def motivation(predator, prey) # ... end
206. class Verse attr_reader :critters, i def initialize(critters) # ... def to_s # ... def chain # ... def motivation(predator, prey) # ... end
207. class Verse attr_reader :critters, i def initialize(critters) # ... def to_s # ... private def chain # ... def motivation(predator, prey) # ... end
208. class Song def initialize # ... def lyrics (1..8).map {|i| verse(i) }.join("\n") end private def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
209. class Song def initialize # ... def lyrics (1..8).map {|i| verse(i) }.join("\n") end private def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
210. class Song def initialize # ... def lyrics (1..8).map {|i| Verse.new(critters.last(i)) }.join("\n") end private def verse(i) # ... def chain(i) # ... def motivation(predator, prey) # ... end
211. class Song def initialize # ... def lyrics (1..8).map {|i| Verse.new(critters.last(i)) }.join("\n") end end
212. # Running: . 1 assertions, 0 failures, 0 errors, 0 skips
213. class Verse attr_reader :critters, :i def initialize(critters) @critters = critters @i = critters.length end def to_s case i when 1, 8 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside else "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end end private def chain critters.last(i).each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end class Critter < Struct.new(:name, :qualifier, :aside) def epithet [name, qualifier].compact.join(" ") end end class Song DATA = [ ["horse", nil, "She's dead, of course!"], ["cow", nil, "I don't know how she swallowed a cow!"], ["goat", nil, "Just opened her throat and swallowed a goat!"], ["dog", nil, "What a hog, to swallow a dog!"], ["cat", nil, "Imagine that, to swallow a cat!"], ["bird", nil, "How absurd to swallow a bird!"], [ "spider", "that wriggled and jiggled and tickled inside her", "It wriggled and jiggled and tickled inside her.", ], ["fly", nil, "I don't know why she swallowed the fly. Perhaps she'll die."], ] attr_reader :critters def initialize @critters = DATA.map {|row| Critter.new(*row)} end def lyrics (1..8).map {|i| Verse.new(critters.last(i)) }.join("\n") end end
214. class Critter < Struct.new(:name, :qualifier, :aside) def epithet [name, qualifier].compact.join(" ") end end
215. class Song DATA = [ ["horse", nil, "She's dead, of course!"], ["cow", nil, "I don't know how she swallowed a cow!"], ["goat", nil, "Just opened her throat and swallowed a goat!"], ["dog", nil, "What a hog, to swallow a dog!"], ["cat", nil, "Imagine that, to swallow a cat!"], ["bird", nil, "How absurd to swallow a bird!"], [ "spider", "that wriggled and jiggled and tickled inside her", "It wriggled and jiggled and tickled inside her.", ], ["fly", nil, "I don't know why she swallowed the fly. Perhaps she'll die."], ] attr_reader :critters def initialize @critters = DATA.map {|row| Critter.new(*row)} end def lyrics (1..8).map {|i| Verse.new(critters.last(i)) }.join("\n") end end
216. class Verse attr_reader :critters, :i def initialize(critters) @critters = critters @i = critters.length end def to_s case i when 1, 8 "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside else "I know an old lady who swallowed a %s.\n" % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end end private def chain critters.last(i).each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end
218. SFTJEVF
219. case i when 1, 8 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside else "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end
220. case i when 1, 8 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside else "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end
221. case i when 1, 8 "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside else "I know an old lady..." % critters.last(i).first.name + "%s\n" % critters.last(i).first.aside + "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end
222. case i when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed..." end
223. def summary case i when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed..." end end
224. def recap case i when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed..." end end
225. "I know an old lady who swallowed a %s.\n%s\n" % [ critters.last(i).first.name, critters.last(i).first.aside, ]
226. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critters.last(i).first.name, critters.last(i).first.aside, ] end
227. def to_s incident + recap end
228. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critters.last(i).first.name, critters.last(i).first.aside, ] end def recap case i when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly..." end end
229. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critters.last(i).first.name, critters.last(i).first.aside, ] end def chain critters.last(i).each_cons(2).map {|pair| motivation(*pair) }.join("\n") end
230. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critters.first.name, critters.first.aside, ] end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end
231. attr_reader :critters, :i def initialize(critters) @critters = critters @i = critters.length end def to_s case i when 1, 8 # ... else # ... end end
232. attr_reader :critters, :i def initialize(critters) @critters = critters @i = critters.length end def to_s case i when 1, 8 # ... else # ... end end
233. attr_reader :critters def initialize(critters) @critters = critters end def to_s case critters.length when 1, 8 # ... else # ... end end
234. attr_reader :critters def initialize(critters) @critters = critters end def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critters.first.name, critters.first.aside, ] end
235. attr_reader :critters def initialize(critters) @critters = critters end def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critters.first.name, critters.first.aside, ] end
236. attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end
237. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end
238. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end
239. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % "I don't know why she swallowed the fly. Perhaps she'll die." end end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end
240. def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end
241. class Verse attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def to_s incident + recap end private def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end
242. def to_s incident + recap end class Verse attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def to_s incident + recap end private def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end
243. def incident "I know an old lady..." % [ critter.name, critter.aside, ] end class Verse attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def to_s incident + recap end private def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end
244. class Verse attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def to_s incident + recap end private def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end
245. def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end class Verse attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def to_s incident + recap end private def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end
246. def motivation(predator, prey) "... %s to catch the %s." % [ predator.name, prey.epithet, ] end class Verse attr_reader :critters, :critter def initialize(critters) @critters = critters @critter = critters.first end def to_s incident + recap end private def incident "I know an old lady who swallowed a %s.\n%s\n" % [ critter.name, critter.aside, ] end def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end def chain critters.each_cons(2).map {|pair| motivation(*pair) }.join("\n") end def motivation(predator, prey) "She swallowed the %s to catch the %s." % [ predator.name, prey.epithet, ] end end
248. QPMZNPSQIJTN
249. OPQF
250. DIBOHF
254. class Song DATA = [...] # ... end
255. class Song DATA = [...] def initialize @critters = DATA.map {|row| Critter.new(*row)} end # ... end
256. class Song DATA = [...] def initialize(data=DATA) @critters = DATA.map {|row| Critter.new(*row)} end # ... end
257. class Song DATA = [...] def initialize(data=DATA) @critters = data.map {|row| Critter.new(*row)} end # ... end
258. def lyrics (1..8).map {|i| Verse.new(critters.last(i)) }.join("\n") end
259. def lyrics (1..8).map {|i| Verse.new(critters.last(i)) }.join("\n") end
260. def lyrics (1..critters.length).map {|i| Verse.new(critters.last(i)) }.join("\n") end
261. class Verse # ... def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end # ... end
262. PQUJPOT
263. Verse.new(critters.last(i))
264. Verse.new(critters.last(i)) Verse.new(critters.last(i), critters.length)
265. Verse.new(critters.last(i)) Verse.new(critters.last(i), critters.length) Verse.new(critters, i)
266. Verse.new(critters.last(i)) Verse.new(critters.last(i), critters.length) Verse.new(critters, i) Verse.new(critters.last(i), :short)
267. PQUJPOT
268. QPMZNPSQIJTN
269. class Verse # ... def recap case critters.length when 1, 8 "" else "%s\n" % chain + "%s\n" % critters.last.aside end end end
270. class LongVerse # ... def recap end end class ShortVerse # ... def recap end end
271. # else class LongVerse # ... def recap "%s\n" % chain + "%s\n" % critters.last.aside end end # when 1, 8 class ShortVerse # ... def recap "" end end
272. # else class LongVerse # ... def recap "%s\n" % chain + "%s\n" % critters.last.aside end end # when 1, 8 class ShortVerse # ... def recap "" end end
273. # else class LongVerse # ... def recap "%s\n" % chain + "%s\n" % critters.last.aside end def chain # ... def motivation(predator, prey) # ... end # when 1, 8 class ShortVerse # ... def recap "" end end
274. class {Short,Long}Verse attr_reader :critters def initialize(critters) # ... def to_s # ... private def recap # ... end end
275. class ShortVerse attr_reader :critters def initialize(critters) # ... def to_s # ... private def recap "" end end
276. class LongVerse < ShortVerse end
277. class LongVerse < ShortVerse private def recap "%s\n" % chain + "%s\n" % critters.last.aside end end
278. class LongVerse < ShortVerse private def recap "%s\n" % chain + "%s\n" % critters.last.aside end def chain # ... def motivation(predator, prey) # ... end
279. class Song # ... def lyrics (1..critters.length).map {|i| ???.???(critters, i) }.join("\n") end # ... end
280. case i when 1, critters.length ShortVerse else LongVerse end
281. case i when 1, critters.length ShortVerse else LongVerse end.new(critters.last(i))
282. class Song def self.verse_builder(critters, i) case i when 1, critters.length ShortVerse else LongVerse end.new(critters.last(i)) end end
283. class Verse def self.for(critters, i) case i when 1, critters.length ShortVerse else LongVerse end.new(critters.last(i)) end end
284. class Song # ... def lyrics (1..critters.length).map {|i| Verse.for(critters, i) }.join("\n") end # ... end
285. qFYJCJMJUZ
286. data = [ ["D", nil, "Nope."], ["C", nil, "ZOMG C!"], ["B", "that blah blah", "Squee, B!"], ["A", nil, "IDK why A."], ]
287. <<-SONG I know an old lady who swallowed an A. IDK why A. I know an old lady who swallowed a B. Squee, B! She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a C. ZOMG C! She swallowed the C to catch the B that blah blah. She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a D. Nope. SONG
288. <<-SONG I know an old lady who swallowed an A. IDK why A. I know an old lady who swallowed a B. Squee, B! She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a C. ZOMG C! She swallowed the C to catch the B that blah blah. She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a D. Nope. SONG
289. <<-SONG I know an old lady who swallowed an A. IDK why A. I know an old lady who swallowed a B. Squee, B! She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a C. ZOMG C! She swallowed the C to catch the B that blah blah. She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a D. Nope. SONG
290. <<-SONG I know an old lady who swallowed an A. IDK why A. I know an old lady who swallowed a B. Squee, B! She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a C. ZOMG C! She swallowed the C to catch the B that blah blah. She swallowed the B to catch the A. IDK why A. I know an old lady who swallowed a D. Nope. SONG
291. assert_equal expected, Song.new(data).lyrics
292. 1) Failure: SongTest#test_alt_critters [song_test.rb:90]: --- expected +++ actual @@ -1,4 +1,4 @@ -"I know an old lady who swallowed an A. +"I know an old lady who swallowed a A.
293. [FCSB B
294. BMMJHBUPS BO
295. class Critter < Struct.new(:name, :qualifier, :aside) def epithet [name, qualifier].compact.join(" ") end def article if name[0] =~ /[aeiouAEIOU]/ "an" else "a" end end end
296. # Running: .. 2 assertions, 0 failures, 0 errors, 0 skips
297. UIFO
     NBLF
     UIF
     FBTZ
     DIBOHF - Kent Beck NBLF
     UIF
     DIBOHF
     FBTZ XBSOJOH
     UIJT
     NBZ
     CF
     IBSE
298. SFGBDUPSJOH is insight
299. UIBOL
     ZPV
300. HJUIVCDPNLZUSJOZY succession
301. Katrina Owen Sandi Metz & by CPUUMFTCPPLDPN
302. FYFSDJTN JP IUUQ
303. Katrina Owen FYFSDJTNJP !LZUSJOZY
304. UIBOLT <3