Regular Expressions 101

Pro

Group 1(\w*)

\w*a Unicode word character, repeated any number of times

Group 2(\d(?:\/\d)*)

\da Unicode decimal digit

Non-Capturing Group(?:\/\d)*

*repeats the group contents below any number of times:

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\da Unicode decimal digit

Non-Capturing Group(?:\.)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3(\d*)?

?repeats the group contents below at most once:

\d*a Unicode decimal digit, repeated any number of 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

(\w*)(\d(?:\/\d)*)(?:\.)?(\d*)?$

GigabitEthernet0/0/0
GigabitEthernet0/0
FastEthernet0
Gi0/0/0
F0
GigabitEthernet0/0/0.23
Gi0/0.1
F0.101

GigabitEthernet0/0/0
GigabitEthernet0/0
FastEthernet0
Gi0/0/0
F0
GigabitEthernet0/0/0.23
Gi0/0.1
F0.101