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  1. s = 'a5bc2cdf3'
  2. index = 5
  3. result = ""
  4. s.gsub!(/([a-zA-Z]+)(\d+)/){
  5.     result << $1*$2.to_i
  6. 	break if $~.end(0) >= index
  7. }
  8. puts result[index]
Success #stdin #stdout 0.02s 9720KB
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https://ideone.com/OUHPFK
language:
Ruby (ruby 2.5.5)
created:
7 years ago
visibility:
secret

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