Date regex, exclude issue

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Hello Everyone,

I am new to regex and still learning. I am writing a regex to capture date from multiple pdf files. On the pdf files there are 2 dates mentioned in below format. I just want to capture First one and exclude Loss Date from my results. The regex I use is still capturing Loss Date. Can you please help me and let me know how can I exclude Loss Date?

Thank you

https://i.ibb.co/XZD0kSz/image.png[^]

What I have tried:

(?:Date : )?(?:(?:[12][0-9]|0[1-9])[/.-]02|(?:30|[12][0-9]|0[1-9])[/.-](?:0[469]|11)|(?:3[01]|[12][0-9]|0[1-9])[/.-](?:0[13578]|1[02]))[/.-][0-9]{4}

To exclude I tried

(?!\s*Loss Date)

Posted 8-Jun-23 15:58pm

mooregexlearner

Updated 13-Jun-23 3:07am

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2 solutions

Solution 1

I'd use regex pattern like that:

^(?:(?<!Loss )Date : )(?<Month>(0[1-9]|1[0-2]))\/(?<Day>(0[1-9]|1\d|2\d|3[01]))\/(?<Year>((19|20)\d{2}))$

Demo: regex101: build, test, and debug regex[^]

BTW: i suggest to read this: Regex Tutorial - Lookahead and Lookbehind Zero-Length Assertions[^]

Posted 12-Jun-23 6:26am

Maciej Los

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mooregexlearner · Accepted Answer · 2023-06-13T03:07:00

Solution 2

Thank you for your help. I tried it but it didnt work. I was able to found a solution using below regex.

(?<!Loss )Date : (?:02[/.-](?:[12][0-9]|0[1-9])|(?:0[469]|11)[/.-](?:30|[12][0-9]|0[1-9])|(?:0[13578]|1[02])[/.-](?:3[01]|[12][0-9]|0[1-9]))[/.-][0-9]{4}

Posted 13-Jun-23 3:07am

mooregexlearner