gemfunc

CheckParans.rb

module CheckParans
    def self.valid_parentheses(string)
        only_parants = string.scan(/([()])/)
        if only_parants.empty?
          true
        elsif only_parants.length == 1
          false
        end
        k = false
        until k == true
          dummy = only_parants.length
          (0..only_parants.length - 1).each do |i|
            next unless only_parants[i] == ['('] && only_parants[i + 1] == [')']
            only_parants.delete_at(i)
            only_parants.delete_at(i)
            break
          end
          k = true if dummy == only_parants.length
        end
        only_parants.empty? ? true : false
    end
end