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Author: alt515

Determine if it is a number

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Post time: 2020-7-23 22:45:01
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Convenient to use regular
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Post time: 2020-7-23 23:45:01
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I don't know much about regularity, I learned
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Post time: 2020-7-24 09:45:01
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..........
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Post time: 2020-7-24 11:45:01
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try...catch... is also possible
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