Regular Expressions 101

Explanation

Pro

Negative Lookbehind(?<!\d)

\da digit

Negative Lookahead(?!\d)

\da digit

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

(?<!\d)\d(?!\d)

New

a1 cat
Call agent 7, pronto!
a1 101 2 cat 3.
1 a22 2 101 x4y

a1 cat
Call agent 7, pronto!
a1 101 2 cat 3.
1 a22 2 101 x4y