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  1. class String
  2. 	def isalpha?
  3. 		!!match(/^[[:alpha:]]+$/)
  4. 	end
  5. 	def isdigit?
  6. 		!!match(/^\d+$/)
  7. 	end
  8. end
  9.  
  10. print 'f'.isalpha?, ' ', '1'.isalpha?, "\n"
  11. print 'f'.isdigit?, ' ', '1'.isdigit?
Success #stdin #stdout 0.01s 7412KB
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stdin
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Standard input is empty
stdout
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true false
false true
https://ideone.com/dO5jTw
language:
Ruby (ruby 2.5.5)
created:
9 years ago
visibility:
public

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