Regular Expressions 101

Pro

^start of line

Group 1(.+)

.+any Unicode character (except for line terminators), repeated at least once

Group 2(\@)

\@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 3(\w+)

\w+a Unicode word character, repeated at least once

Group 4(\.)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 5(\w{3,4})

\w{3,4}a Unicode word character, repeated between 3 and 4 times

$end of line

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

^(.+)(\@)(\w+)(\.)(\w{3,4})$

New

some@email.com
yo@email.com
yoo@email.com
212@yahoo.com
@yahoo.com
moreover@.
superb@.com
yahoo.com@superninja.net
hmmer.com@
some@email.body
superb@new.horizon
super.man.followme@neworld.wow

Extraction

some@email.com
yo@email.com
yoo@email.com
212@yahoo.com
@yahoo.com
moreover@.
superb@.com
yahoo.com@superninja.net
hmmer.com@
some@email.body
superb@new.horizon
super.man.followme@neworld.wow