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implement to_a and to_ary so that the Array() call in template.rb will
not raise so many exceptions: https://github.com/rails/rails/blob/master/actionpack/lib/action_view/template.rb#L126 irb(main):001:0> class Foo; def method_missing(*args); super; end end => nil irb(main):002:0> $DEBUG = true => true irb(main):003:0> Array(Foo.new) Exception `NoMethodError' at (irb):1 - undefined method `to_ary' for #<Foo:0x007f854390e488> Exception `NoMethodError' at (irb):1 - undefined method `to_a' for #<Foo:0x007f854390e488> => [#<Foo:0x007f854390e488>] irb(main):004:0>
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