Regular Expressions 101

.*?any character (except for line terminators), repeated any number of times

\Bnot an ASCII word boundary

@the literal @ (64₁₀ / 100₈ / 40₁₆)

\w{5}any word character, repeated exactly 5 times

.*any character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

.*?\B@\w{5}.*

New

Pattern should match all this lines :

Hi @username how are you?

Hi @username.how are you?

😉@username.

And should not match email like this:

Hi email to something@domain.com

Extraction

Pattern should match all this lines :

Hi @username how are you?

Hi @username.how are you?

😉@username.

And should not match email like this:

Hi email to something@domain.com