Menu
I was trying to understand about validating email in the following link - http://www.w3schools.com/PHP/php_form_url_email.asp
I know that \w means alphanumeric characters i.e. [0-9a-zA-Z] and - should mean to include a "-" as well. I got confused because they have used it after the "." as well, I think that after "." only alphanumeric characters can appear such as "com" , "org" etc.
902
The Difference Between \s and \s+ The plus sign + is a greedy quantifier, which means one or more times. For example, expression X+ matches one or more X characters. Therefore, the regular expression \s matches a single whitespace character, while \s+ will match one or more whitespace characters.
Example: The regex "aa\n" tries to match two consecutive "a"s at the end of a line, inclusive the newline character itself. Example: "a\+" matches "a+" and not a series of one or "a"s. ^ the caret is the anchor for the start of the string, or the negation symbol. Example: "^a" matches "a" at the start of the string.
The RegExp \D Metacharacter in JavaScript is used to search non digit characters i.e all the characters except digits. It is same as [^0-9]. Syntax: /\D/
\w explained
\w match any word character [a-zA-Z0-9_]
\w\- explained
\w\-
\w match any word character [a-zA-Z0-9_]
\- matches the character - literally
\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}\b
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
