Helpers
helper(*args, &block)
helper FooHelper # => includes FooHelperhelper :foo
# => requires 'foo_helper' 和 includes FooHelper
helper 'resources/foo'
# => requires 'resources/foo_helper' 和 includes Resources::FooHelperhelper(:three, BlindHelper) { def mice() 'mice' end }helper_method(*meths)
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