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Validating regular expression

validating regular expression-17

Postal Address – allow only alphanumeric characters, spaces and few other characters like comma, period and hash symbol in the form input field.5.URL (Web domain) – this is useful for fields that require the user to enter their website address and it even matches the upcoming TLDs like .directory or .restaurant.

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After reading this article you’ll be able to do advanced javascript validation using regular expressions a.k.a.A regular expression may appear gibberish but they aren’t so difficult to read and understand if you can know the basic rules of the language.What you see here is a compilation of some useful regular expressions that can be used to validate common form fields like URLs, phone numbers, zip codes, dates, etc.1. [email protected]%*– email’s tld is only allow character and digit 9. [email protected]– email’s last character can not end with dot “.” 11. [email protected] -email’s tld which has two characters can not contains digit Here’s a unit test using test NG. [email protected] – “.a” is not a valid tld, last tld must contains at least two characters 4. mkyong()*@– email’s is only allow character, digit, underscore and dash 8.And even if the format is proper, is the data itself valid?

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Regular expression is one of the fundamental skills in programming tasks.

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When you are expecting dozens, or even hundreds, of responses in your Google Forms, it is always a good idea to have some rules in place and respondents data should be matched against these rules even before they submit the form.

The email’s domain name must start with “A-Za-z0-9-“, follow by first level Tld (.com, .net) “.[A-Za-z0-9]” and optional follow by a second level Tld (au, my) “\\.[A-Za-z]”, where second level Tld must start with a dot “.” and length must equal or more than 2 characters.