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  1. # -*- coding: utf-8 -*-
  2. # sample: http://o...content-available-to-author-only...e.jp/qa/q6934012.html
  3.  
  4. print DATA.read.gsub(/(?<!\d)(\d{2})(?!\d)/){"♪#{$1}♪"}
  5.  
  6. __END__
  7. 23
  8. 234
  9. 1234
  10. a23b
  11. 学23
  12. 23学
  13. 2323
  14. 浜23浜
Success #stdin #stdout 0s 4760KB
comments (?)
stdin 
Standard input is empty
stdout 
♪23♪
234
1234
a♪23♪b
学♪23♪
♪23♪学
2323
浜♪23♪浜
https://ideone.com/5m2Gn
language:
Ruby (ruby 2.5.5)
created:
12 years ago
visibility:
secret

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