I would need to retrieve an email id from a email address. (i.e. [email protected] => this-is-the-best-email)
The regex that I used is (.*)@.* .
Now I need truncate the string with N characters. (i.e. N=7 => this-is )
How would I add this to a existing regex? Any other recommendations?
CodePudding user response：
What about: ([^@]{1,7}). ?
[email protected]
[email protected]
Becomes:
this-is
short
CodePudding user response：
I think that this is what you are looking for:
((.{1,7}).*)@.
The first capturing group contains the full id and the second group contains up to 7 chars.
CodePudding user response：
In your pattern (.*)@.* you don't need the trailing .* as it is optional, and the dot can match any character including spaces and the @ itself which can match much more that just an email like address.
The thing of interest is the non whitespace chars excluding an @ char before actually matching the @, and in that case you can use a capture group matching 7 non whitespace chars.
([^\s@]{7})[^\s@]*@
The pattern matches:
([^\s@]{7})Capture group 1, match 7 non whitespace chars excluding @[^\s@]*Optionally match any non whitespace char excluding @@Match literally