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Regular Expression Details

Title Test Find Explain the following regular expressions. Where would they be used? What potential problems do you foresee in using them?
Expression
^[a-zA-Z0-9]+([_.-]?[a-zA-Z0-9]+)?@[a-zA-Z0-9]+([_-]?[a-zA-Z0-9]+)*([.]{1})[a-zA-Z0-9]+([.]?[a-zA-Z0-9]+)*$
Description
Explain the following regular expressions. Where would they be used? What potential problems do you foresee in using them?
Matches
I dnthave any idea
Non-Matches
I dnt have any idea
Author Rating: Not yet rated. Kanupriya Surana
Source
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