Ruby | Regexp named_captures() function

Regexp#named_captures() : named_captures() is a Regexp class method which returns a hash representing information about named captures of regular expression. A key of the hash is a name of the named capture produces a formatted string-version of the regular expression.

Syntax: Regexp.named_captures()

Parameter: Regexp values

Return: a hash representing information about named captures of regular expression

Example #1 :

# Ruby code for Regexp.named_captures() method

# declaring Regexp value
reg_a = /a/

# declaring Regexp value
reg_b = /geeks/

# declaring Regexp value
reg_c = /a/


#  named_captures method
puts "Regexp named_captures form : #{reg_a.named_captures}\n\n"

puts "Regexp named_captures form : #{reg_b.named_captures}\n\n"

puts "Regexp named_captures form : #{reg_c.named_captures}\n\n"

Output :

Regexp named_captures form : {}

Regexp named_captures form : {}

Regexp named_captures form : {}

Example #2 :

# Ruby code for Regexp.named_captures() method

# declaring Regexp value
reg_a = /geeks/

# declaring Regexp value
reg_b = /problem/

# declaring Regexp value
reg_c = /code/


#  named_captures method
puts "Regexp named_captures form : #{reg_a.named_captures}\n\n"

puts "Regexp named_captures form : #{reg_b.named_captures}\n\n"

puts "Regexp named_captures form : #{/(?<goio>.)(?<goio>.)/.named_captures}\n\n"

Output :

Regexp named_captures form : {}

Regexp named_captures form : {}

Regexp named_captures form : {"goio"=>[1, 2]}