uninitialized constant Excelx (NameError)
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在用roo解析excel表的时候，代码如下：
oo = Excelx.new("#{filepath}/#{filename}.xlsx")官方文档也是这么写的，但是还是报错了
uninitialized constant Excelx (NameError)
查了半天，最后在一个角落里找到了。。。幸福如此简单。。。
oo = Roo::Excelx.new("#{filepath}/#{filename}.xlsx")这样就行了
我的环境是1.8.7，据说1.9.3不支持roo，我没有实验
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