Will be scanning many files with a program that needs to look for a specific string.
The string is ######-####-P
So basically 6 various numbers followed by a dash then 4 more numbers another dash and a capital P.
by Batuhan Cetin
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Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions.
Consider email address RFCs:
Look at HTML5 form input element (with type=email) regex pattern: