This Regular expression is applicable to all string literals. If we want to match character outside those strings, then just need to add that character in rest of the groups.

YYYYMMDD YYYY-MM-DD YYYY.MM.DD YYYY/MM/DD YYYY-M-D YYYY.M.D...

Even though using a delimiter within a string, without escaping it, is an illegal character, sometimes this still happens and we need to extract a HTML value.

Ensure the ip address format is correct

Regex to match USD currency in a text

Ensure the ip address format is correct

for quadratic equations ||ax^2+bx+c=d||

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