I have experimented with a regular expression that matches strings containing zero or more occurrences of "%" and "&", but returns false if "@" or "$" is found:
^((%&)*(?!@).)*$
Now, I require a regex pattern to validate strings that must contain at least 2 special characters from the set (%&), while returning false for any other special character present.
(?=(?:.*[%&]){2,})(?!.*[@$])^.*$
This regular expression utilizes a positive lookahead to ensure that the characters % or & appear at least two times within the string.
Additionally, it includes a negative lookahead to confirm that neither the characters @ nor $ are present in the string.
Update:
The expression now ensures that the entire string is matched by including the anchors ^ and $.
To see this regex in action, click here.
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