fork download 
  1. puts 'test@gmail.com'.gsub(/^[^\s@]+(?=@)/){|m| '*' * m.length }
Success #stdin #stdout 0.01s 6328KB
comments (?)
stdin 
Standard input is empty
stdout 
****@gmail.com
https://ideone.com/HtWP76
language:
Ruby (ruby 2.5.5)
created:
4 years ago
visibility:
secret

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