undefined method `[] for #Enumerable::Enumerator?如果你遇到undefined method `[] for #Enumerabl
undefined method `[]' for #<Enumerable::Enumerator>
?如果你遇到undefined method `[]' for #<Enumerable::Enumerator>，可以将以下代码加入项目中：
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unless '1.9'.respond_to?(:force_encoding) String.class_eval do begin remove_method :chars rescue NameError end endend?
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