The document contains code examples demonstrating the use of Ruby's case statement to handle different data types and values. The case statement is used to check the status, type, or value of a variable and call the appropriate method to handle each case. Common uses include checking an HTTP response status code, getting a nickname based on a first name, and searching for gems based on different query types.

1. Ruby’s
case Statement
by Tim Moore

2. Ruby’s Magical
case Statement
by Tim Moore
Magical

3. There is Totally
Such a Thing as Magic

4. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

5. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

6. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

7. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

8. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

9. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

10. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

11. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

12. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

13. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

14. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

15. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

16. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

17. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

18. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

19. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

20. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

21. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301
handle_redirect(http_response)
when 302
handle_redirect(http_response)
when 303
handle_redirect(http_response)
when 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

22. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301, 302, 303, 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

23. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301, 302, 303, 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
else
handle_unknown_error(http_response)
end
end

24. def handle_response(http_response)
case http_response.status
when 200
handle_success(http_response)
when 301, 302, 303, 307
handle_redirect(http_response)
when 404
handle_not_found(http_response)
when 400...500
handle_client_error(http_response)
when 500...600
handle_server_error(http_response)
else
handle_unknown_error(http_response)
end
end

25. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

26. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

27. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

28. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

29. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

30. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

31. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

32. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

33. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

34. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

35. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

36. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

37. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end
irb> nickname 'Christopher'
=> "Chris"
irb> nickname 'Abigail'
=> "Abby"
irb> nickname 'Christina'
=> "Chris"
irb> nickname 'Fabio'
=> "Fabio"

38. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

39. def nickname(first_name)
case first_name
when 'Abraham'
nickname = 'Abe'
when 'Abigail'
nickname = 'Abby'
when 'Christopher',
'Christian',
'Christina'
nickname = 'Chris'
# etc., etc.
else
nickname = first_name
end
nickname
end

40. def nickname(first_name)
nickname = case first_name
when 'Abraham'
'Abe'
when 'Abigail'
'Abby'
when 'Christopher',
'Christian',
'Christina'
'Chris'
# etc., etc.
else
first_name
end
nickname
end

41. def nickname(first_name)
nickname = case first_name
when 'Abraham'
'Abe'
when 'Abigail'
'Abby'
when 'Christopher',
'Christian',
'Christina'
'Chris'
# etc., etc.
else
first_name
end
nickname
end

42. def nickname(first_name)
case first_name
when 'Abraham'
'Abe'
when 'Abigail'
'Abby'
when 'Christopher',
'Christian',
'Christina'
'Chris'
# etc., etc.
else
first_name
end
!
end

43. class Color <
Struct.new(:r,:g,:b)
!
RED = Color.new(
0xFF, 0x00, 0x00
)
GREEN = Color.new(
0x00, 0xFF, 0x00
)
BLUE = Color.new(
0x00, 0x00, 0xFF
)
CYAN = Color.new(
0x00, 0xFF, 0xFF
)
MAGENTA = Color.new(
0xFF, 0x00, 0xFF
)
YELLOW = Color.new(
0xFF, 0xFF, 0x00
)
!
end
def primary?(color, mode)
case color
when Color::RED,
Color::GREEN,
Color::BLUE
mode == :additive
when Color::CYAN,
Color::MAGENTA,
Color::YELLOW
mode == :subtractive
else
false
end
end

44. class Color <
Struct.new(:r,:g,:b)
!
RED = Color.new(
0xFF, 0x00, 0x00
)
GREEN = Color.new(
0x00, 0xFF, 0x00
)
BLUE = Color.new(
0x00, 0x00, 0xFF
)
CYAN = Color.new(
0x00, 0xFF, 0xFF
)
MAGENTA = Color.new(
0xFF, 0x00, 0xFF
)
YELLOW = Color.new(
0xFF, 0xFF, 0x00
)
!
end
def primary?(color, mode)
case color
when Color::RED,
Color::GREEN,
Color::BLUE
mode == :additive
when Color::CYAN,
Color::MAGENTA,
Color::YELLOW
mode == :subtractive
else
false
end
end
irb> primary? Color::RED, :additive
=> true
irb> primary? Color::RED, :subtractive
=> false
irb> primary? Color::CYAN, :subtractive
=> true
irb> primary? Color.new(0,0,255), :additive
=> true
irb> primary? Color.new(0,127,255), :additive
=> false

45. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

46. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

47. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

48. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

49. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

50. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

51. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

52. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

53. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

54. def local_search(query)
case query
when String
specs_by_name(query)
when Gem::Dependency
search_by_dependency(query)
when Gem::Specification,
RemoteSpecification,
LazySpecification,
EndpointSpecification
search_by_spec(query)
else
raise "You can't search for #{query}."
end
end

55. def want_a_beer?(beer_type)
case beer_type
when /^Sierra Nevada|IPA/
:yes
when /V(ictoria)? ?B(itter)?/,
/Bud(weiser)?/
:no
else
:probably
end
end

56. def want_a_beer?(beer_type)
case beer_type
when /^Sierra Nevada|IPA/
:yes
when /V(ictoria)? ?B(itter)?/,
/Bud(weiser)?/
:no
else
:probably
end
end

57. def want_a_beer?(beer_type)
case beer_type
when /^Sierra Nevada|IPA/
:yes
when /V(ictoria)? ?B(itter)?/,
/Bud(weiser)?/
:no
else
:probably
end
end

58. def want_a_beer?(beer_type)
case beer_type
when /^Sierra Nevada|IPA/
:yes
when /V(ictoria)? ?B(itter)?/,
/Bud(weiser)?/
:no
else
:probably
end
end

59. def want_a_beer?(beer_type)
case beer_type
when /^Sierra Nevada|IPA/
:yes
when /V(ictoria)? ?B(itter)?/,
/Bud(weiser)?/
:no
else
:probably
end
end
irb> want_a_beer? 'Sierra Nevada Pale Ale'
=> :yes
irb> want_a_beer? 'Sierra Nevada Torpedo IPA'
=> :yes
irb> want_a_beer? 'Mountain Goat IPA'
=> :yes
irb> want_a_beer? 'Victoria Bitter'
=> :no
irb> want_a_beer? 'VB'
=> :no
irb> want_a_beer? 'V Bitter'
=> :no
irb> want_a_beer? 'Budweiser'
=> :no
irb> want_a_beer? 'Bud'
=> :no
irb> want_a_beer? 'Bud Light'
=> :no
irb> want_a_beer? 'Coopers Pale Ale'
=> :probably
irb> want_a_beer? 'Stella Artois'
=> :probably

60. class Color
def more_blue?
b > r && b > g
end
!
def more_red?
r > b && r > g
end
!
def more_green?
g > r && g > b
end
end
def describe_color(color)
case color
when proc {|color|
color.more_blue? }
"blueish"
when proc {|color|
color.more_red? }
"reddish"
when proc {|color|
color.more_green? }
"greenish"
else
"pretty"
end
end

61. class Color
def more_blue?
b > r && b > g
end
!
def more_red?
r > b && r > g
end
!
def more_green?
g > r && g > b
end
end
def describe_color(color)
case color
when proc {|color|
color.more_blue? }
"blueish"
when proc {|color|
color.more_red? }
"reddish"
when proc {|color|
color.more_green? }
"greenish"
else
"pretty"
end
end
irb> describe_color Color::RED
=> "reddish"
irb> describe_color Color::GREEN
=> "greenish"
irb> describe_color Color.new(0xCC,0x11,0xFF)
=> "blueish"
irb> describe_color Color::CYAN
=> "pretty"

62. class Color
def more_blue?
b > r && b > g
end
!
def more_red?
r > b && r > g
end
!
def more_green?
g > r && g > b
end
end
def describe_color(color)
case color
when proc {|color|
color.more_blue? }
"blueish"
when proc {|color|
color.more_red? }
"reddish"
when proc {|color|
color.more_green? }
"greenish"
else
"pretty"
end
end

63. class Color
def more_blue?
b > r && b > g
end
!
def more_red?
r > b && r > g
end
!
def more_green?
g > r && g > b
end
end
def describe_color(color)
case color
when :more_blue?.to_proc
"blueish"
when :more_red?.to_proc
"reddish"
when :more_green?.to_proc
"greenish"
else
"pretty"
end
end

65. ===“case equality operator”

66. ===“threequals”

67. case object
when case1
do_something
when case2
do_another_thing
else
do_something_else
end

68. object
case1
do_something
case2
do_another_thing
else
do_something_else
end

69. !
if case1 === object
do_something
elsif case2 === object
do_another_thing
else
do_something_else
end

70. class Range
def ===(value)
self.include?(value)
end
end

71. class Module
def ===(object)
object.is_a?(self)
end
end

72. class Regexp
def ===(string)
if self =~ string
true
else
false
end
end
end

73. class Proc
def ===(object)
self.call(object)
end
end

74. class Object
def ===(other)
self == other
end
end

75. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

76. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

77. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

78. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

79. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

80. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

81. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

82. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

83. class VersionMatcher <
Struct.new(:operator, :req_version)
def ===(version)
case operator
when "="
version == req_version
when ">"
version > req_version
when "<"
version < req_version
when ">="
version >= req_version
when "<="
version <= req_version
else
false
end
end
end

84. class VersionMatcher <
Struct.new(:operator, :req_version)
def ===(version)
case operator
when "="
version == req_version
when ">"
version > req_version
when "<"
version < req_version
when ">="
version >= req_version
when "<="
version <= req_version
else
false
end
end
end

85. class VersionMatcher <
Struct.new(:operator, :req_version)
def ===(version)
case operator
when "="
version == req_version
when ">"
version > req_version
when "<"
version < req_version
when ">="
version >= req_version
when "<="
version <= req_version
else
false
end
end
end

86. class VersionMatcher <
Struct.new(:operator, :req_version)
def ===(version)
case operator
when "="
version == req_version
when ">"
version > req_version
when "<"
version < req_version
when ">="
version >= req_version
when "<="
version <= req_version
else
false
end
end
end

87. class VersionMatcher <
Struct.new(:operator, :req_version)
def ===(version)
case operator
when "="
version == req_version
when ">"
version > req_version
when "<"
version < req_version
when ">="
version >= req_version
when "<="
version <= req_version
else
false
end
end
end

88. class VersionMatcher::All <
Struct.new(:version_matchers)
!
def ===(version)
version_matchers
.all? {|matcher| matcher === version }
end
!
end

89. class VersionMatcher::All <
Struct.new(:version_matchers)
!
def ===(version)
version_matchers
.all? {|matcher| matcher === version }
end
!
end

90. class VersionMatcher::All <
Struct.new(:version_matchers)
!
def ===(version)
version_matchers
.all? {|matcher| matcher === version }
end
!
end

91. class VersionMatcher::All <
Struct.new(:version_matchers)
!
def ===(version)
version_matchers
.all? {|matcher| matcher === version }
end
!
end

92. class VersionMatcher::All <
Struct.new(:version_matchers)
!
def ===(version)
version_matchers
.all? {|matcher| matcher === version }
end
!
end

93. def version(requirements)
case requirements
when String
op, req_version = requirements.split
VersionMatcher.new(op, req_version)
when Array
matchers =
requirements.map {|r| version(r)}
VersionMatcher::All.new(matchers)
end
end

94. def version(requirements)
case requirements
when String
op, req_version = requirements.split
VersionMatcher.new(op, req_version)
when Array
matchers =
requirements.map {|r| version(r)}
VersionMatcher::All.new(matchers)
end
end

95. def version(requirements)
case requirements
when String
op, req_version = requirements.split
VersionMatcher.new(op, req_version)
when Array
matchers =
requirements.map {|r| version(r)}
VersionMatcher::All.new(matchers)
end
end

96. def version(requirements)
case requirements
when String
op, req_version = requirements.split
VersionMatcher.new(op, req_version)
when Array
matchers =
requirements.map {|r| version(r)}
VersionMatcher::All.new(matchers)
end
end

97. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

98. def somegem_adapter
case OtherGem::VERSION
when version("< 1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

99. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

100. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when version([">= 1.0", "< 2.0"])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

101. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when VersionMatcher::All.new([
version(">= 1.0"),
version("< 2.0")
])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

102. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when VersionMatcher::All.new([
version(">= 1.0"),
version("< 2.0")
])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

103. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

104. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
OtherGemAdapter::Version1x.new
when version(">= 2.0")
OtherGemAdapter::Current.new
end
end

105. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
OtherGemAdapter::Version1x.new
when VersionMatcher.new(">=", "2.0")
OtherGemAdapter::Current.new
end
end

106. def somegem_adapter
case OtherGem::VERSION
when VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
when VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
OtherGemAdapter::Version1x.new
when VersionMatcher.new(">=", "2.0")
OtherGemAdapter::Current.new
end
end

107. def somegem_adapter
OtherGem::VERSION
VersionMatcher.new("<", "1.0")
OtherGemAdapter::Prerelease.new
VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
OtherGemAdapter::Version1x.new
VersionMatcher.new(">=", "2.0")
OtherGemAdapter::Current.new
end
end

108. def somegem_adapter
!
if VersionMatcher.new("<", "1.0")
=== OtherGem::VERSION
OtherGemAdapter::Prerelease.new
elsif VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
=== OtherGem::VERSION
OtherGemAdapter::Version1x.new
elsif VersionMatcher.new(">=", "2.0")
=== OtherGem::VERSION
OtherGemAdapter::Current.new
end
!
end

109. def somegem_adapter
!
if VersionMatcher.new("<", "1.0")
=== OtherGem::VERSION
OtherGemAdapter::Prerelease.new
elsif VersionMatcher::All.new([
VersionMatcher.new(">=", "1.0"),
VersionMatcher.new("<" , "2.0")
])
=== OtherGem::VERSION
OtherGemAdapter::Version1x.new
elsif VersionMatcher.new(">=", "2.0")
=== OtherGem::VERSION
OtherGemAdapter::Current.new
end
!
end
irb> OtherGem::VERSION = '0.9'
irb> somegem_adapter
=> #<OtherGemAdapter::Prerelease>
irb> OtherGem::VERSION = '1.0'
irb> somegem_adapter
=> #<OtherGemAdapter::Version1x>
irb> OtherGem::VERSION = '1.2'
irb> somegem_adapter
=> #<OtherGemAdapter::Version1x>
irb> OtherGem::VERSION = '2.0'
irb> somegem_adapter
=> #<OtherGemAdapter::Current>
irb> OtherGem::VERSION = '4.0'
irb> somegem_adapter
=> #<OtherGemAdapter::Current>

110. Thank you!