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  1. s = "Thomas_J_Perkins"
  2. puts s.sub(/^(\p{L}+)(?:_\p{L}+)*_(\p{L})\p{L}*$/, "\\1_\\2")
Success #stdin #stdout 0.05s 9784KB
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Thomas_P
https://ideone.com/kewb1y
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
secret

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