method

grouped_choices?

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What's this?

grouped_choices?() private

Grouped choices look like this:

[nil, []]
{ nil => [] }

Show source

# File actionview/lib/action_view/helpers/tags/select.rb, line 35
          def grouped_choices?
            !@choices.empty? && @choices.first.respond_to?(:last) && Array === @choices.first.last
          end

grouped_choices?

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