Method: Journey::Path::Pattern#optional_names

Defined in:
lib/journey/path/pattern.rb

#optional_names ⇒ Object 



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# File 'lib/journey/path/pattern.rb', line 54

def optional_names
  @optional_names ||= spec.grep(Nodes::Group).map { |group|
    group.grep(Nodes::Symbol)
  }.flatten.map { |n| n.name }.uniq
end