列子
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Regular expression to match non-negative integers in PHP?
I seem to get it to work with the following regexp by preg_match(): @^(?:[1-9][0-9]*)|0$@ Yet it\'s weird that it matches -0, considering there are no - allowed at all in the regexp. Why?[详细]
2022-12-27 02:57 分类：问答列子汤问是谁写的呢？？
流浪的圣伯纳 2022-06-12 14:34 开发者_如何学运维现在关于《列子》一书的真伪还在探讨之中，所以，它是否为周人的著作，现在还无法确定，但它是在魏晋时期定型的结论是毋庸置疑的……就算对其真伪仍无定论，也[详细]
2022-12-17 11:06 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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