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This article is about how regular expressions match numbers. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Efficient regular expressions match numeric instances:

^ [1-9]\ dmatch $/ / match positive integers ^ -? [1-9]\ dmatch $/ / match negative integers ^ [1-9]\ dmatch $/ / match non-negative integers ^ [1-9]\ d* | 0 $/ match non-negative integers (positive integers + 0) ^-[1-9]\ d* | 0 $/ match non-positive integers (negative integers + 0) ) ^ [1-9]\ d*\.\ d* | 0.\ d* [1-9]\ dfloat $/ / match positive floating point number ^-([1-9]\ d*\.\ d* | 0\.\ d* [1-9]\ d*) $/ match negative floating point number ^ -? ([1-9]\ d*.\ d* | 0.\ d* [1-9]\ d* | 0. ?\ .0 + | 0) $/ / match floating point number ^ [1-9]\ d*.\ d* | 0.\ d* [1-9]\ d* | 0?\ .0 + | 0 $/ match non-negative floating point number (positive floating point number + 0) ^ (- ([1-9]\ d*\.\ d* | 0\.\ d* [1-9]\ d*)) | 0?\ .0 + | 0 $/ match non-positive floating point number (negative floating point + 0)

Note: useful when dealing with a large amount of data, pay attention to correction in specific application

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