Flowdock
method

optional_names

Importance_0
Ruby on Rails latest stable (v4.1.8) - 0 notes - Class: Pattern
optional_names() public

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# File actionpack/lib/action_dispatch/journey/path/pattern.rb, line 55
        def optional_names
          @optional_names ||= spec.grep(Nodes::Group).map { |group|
            group.grep(Nodes::Symbol)
          }.flatten.map { |n| n.name }.uniq
        end
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