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Ruby | Regexp names() function
  • Last Updated : 18 Dec, 2019

Regexp#names() : names() is a Regexp class method which produces a formatted string-version of regualar expression.

Syntax: Regexp.names()

Parameter: Regexp values

Return: a formatted string-version of regualar expression

Example #1 :



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# Ruby code for Regexp.names() method
  
# declaring Regexp value
reg_a = /a/
  
# declaring Regexp value
reg_b = /geeks/
  
# declaring Regexp value
reg_c =/(?<go>.)(?<for>.)(?<it>.)/
  
  
#  names method
puts "Regexp names form : #{reg_a.names}\n\n"
  
puts "Regexp names form : #{reg_b.names}\n\n"
  
puts "Regexp names form : #{reg_c.names}\n\n"

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Output :

Regexp names form : []

Regexp names form : []

Regexp names form : ["go", "for", "it"]

Example #2 :

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# Ruby code for Regexp.names() method
  
# declaring Regexp value
reg_a = /geeks/
  
# declaring Regexp value
reg_b = /(?<hi>.)(?<there>.)/
  
# declaring Regexp value
reg_c = /(?<i>.)(?<can>.)(?<code>.)/
  
  
#  names method
puts "Regexp names form : #{reg_a.names}\n\n"
  
puts "Regexp names form : #{reg_b.names}\n\n"
  
puts "Regexp names form : #{reg_c.names}\n\n"

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Output :

Regexp names form : []

Regexp names form : ["hi", "there"]

Regexp names form : ["i", "can", "code"]
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