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为什么空列表为 false ？ #12

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chinesehuazhou opened this issue Dec 22, 2022 · 0 comments

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chinesehuazhou commented Dec 22, 2022 •

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False，None,0,空序列，空字典

1.c语言，0值为假，非0值为真
2.Perl所有空值为假（空字符串，空列表，空哈希），非空值为真
3.Ruby false,nil,0 为假，其它值为真

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