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  1. regex = /s$/  # test: anything ending with "s"
  2.  
  3. singular = [ "car",
  4.              "boat",
  5.              "man",
  6.              "woman",
  7.              "omen",
  8.              "bus",
  9.              "cactus",
  10.              "spy",
  11.              "pie",
  12.              "louse",
  13.              "mouse",
  14.              "amice",
  15.              "goose",
  16.              "creese",
  17.              "person",
  18.              "child",
  19.              "siren",
  20.              "ox",
  21.              "foot",
  22.              "tooth",
  23.              "formula",
  24.              "minx",
  25.              "sphinx",
  26.              "wife",
  27.              "knife",
  28.              "ion",
  29.              "criterion",
  30.              "jinni",
  31.              "zero",
  32.              "hero" ]
  33.  
  34. plural = [ "cars",
  35.            "boats",
  36.            "men",
  37.            "women",
  38.            "omens",
  39.            "buses",
  40.            "cacti",
  41.            "spies",
  42.            "pies",
  43.            "lice",
  44.            "mice",
  45.            "amices",
  46.            "geese",
  47.            "creeses",
  48.            "people",
  49.            "children",
  50.            "sirens",
  51.            "oxen",
  52.            "feet",
  53.            "teeth",
  54.            "formulae",
  55.            "minxes",
  56.            "sphinges",
  57.            "wives",
  58.            "knives",
  59.            "ions",
  60.            "criteria",
  61.            "jinn",
  62.            "zeros",
  63.            "heroes" ] 
  64.  
  65. singular.zip(plural) { |s,p|
  66.   puts " #{s=~regex ? "X" : " "} #{s.ljust(9)}   #{p=~regex ? "X" : " "} "+p
  67. }
  68.  
  69.  
  70. # match_singular = singular.select { |word| word =~ regex }
  71. # puts "MATCHED #{match_singular.size}/#{singular.size} singular nouns:"
  72. # puts match_singular
  73. # puts
  74. # match_plural = plural.select { |word| word =~ regex }
  75. # puts "MATCHED #{match_plural.size}/#{plural.size} plural nouns:"
  76. # puts match_plural
  77.  
Success #stdin #stdout 0.01s 7460KB
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stdin
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   car         X cars
   boat        X boats
   man           men
   woman         women
   omen        X omens
 X bus         X buses
 X cactus        cacti
   spy         X spies
   pie         X pies
   louse         lice
   mouse         mice
   amice       X amices
   goose         geese
   creese      X creeses
   person        people
   child         children
   siren       X sirens
   ox            oxen
   foot          feet
   tooth         teeth
   formula       formulae
   minx        X minxes
   sphinx      X sphinges
   wife        X wives
   knife       X knives
   ion         X ions
   criterion     criteria
   jinni         jinn
   zero        X zeros
   hero        X heroes
https://ideone.com/7NVJnm
language:
Ruby (ruby 2.5.5)
created:
10 years ago
visibility:
public

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