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  1. visits = %w[
  2.   AO
  3.   AL
  4.   OLD
  5.   BA
  6.   CA
  7.   BD
  8.   OBS
  9.   CS
  10. ]
  11. result = {}
  12. visits.each do |visit|
  13.   chars = visit.chars
  14.   chars.each do |char|
  15.     result[char] ||= []
  16.     result[char] += chars - [char]
  17.   end
  18. end
  19. result.each do |k, v|
  20.   puts '%s: %s' % [k, v.join(', ')]
  21. end
  22.  
Success #stdin #stdout 0.01s 6576KB
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stdin
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Standard input is empty
stdout
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A: O, L, B, C
O: A, L, D, B, S
L: A, O, D
D: O, L, B
B: A, D, O, S
C: A, S
S: O, B, C
https://ideone.com/RBMSKm
language:
Ruby (ruby 2.5.5)
created:
4 years ago
visibility:
public

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