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  1. f = ->s, n {s.chars.map.with_index(1) {|c, i| i != n ? ['*', c] : [c, '*']}.transpose.map(&:join)}
  2. puts f.('abc', 2)
Success #stdin #stdout 0s 28216KB
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Standard input is empty
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*b*
a*c
https://ideone.com/6NM2Z2
language:
Ruby (ruby 2.5.5)
created:
6 years ago
visibility:
secret

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