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  1. text = "==aaa== =BBB="
  2. puts text.gsub(/(={1,2})(.*?)\1/) { $1.length == 1 ? $2.downcase : $2.upcase}
Success #stdin #stdout 0.01s 6320KB
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stdin
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Standard input is empty
stdout
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AAA bbb
https://ideone.com/pVBBrv
language:
Ruby (ruby 2.5.5)
created:
2 years ago
visibility:
secret

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