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  1. s = <<'EOF'
  2. [Hello] How are you
  3. Doing
  4.  Hope you have a nice day!
  5. [goodbye] cya 
  6. Take care
  7. EOF
  8. p s.lines.grep(/^(?!\[.*?])/)
Success #stdin #stdout #stderr 0s 28216KB
comments (?)
stdin 
Standard input is empty
stdout 
["Doing\n", " Hope you have a nice day!\n", "Take care\n"]
stderr 
prog.rb:8: warning: regular expression has ']' without escape: /^(?!\[.*?])/
prog.rb:8: warning: regular expression has ']' without escape: /^(?!\[.*?])/
https://ideone.com/sZDrmA
language:
Ruby (ruby 2.5.5)
created:
6 years ago
visibility:
secret

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