Regular Expressions 101

Pro

Negative Lookbehind(?<!-\d+)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a Unicode decimal digit, repeated at least once

Non-Capturing Group(?:-\d+){2}

{2}repeats the group contents below exactly 2 times:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d+a Unicode decimal digit, repeated at least once

$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

(?<!-\d+)(?:-\d+){2}$

New

i try to regex match string like these examples:

NetTAP IPX C-4-16
SmartTAP DP6409 Dual E1-11-16

but not these ones:

NetTAP IPX C-4-16-0
SmartTAP DP6409 Dual E1-11-16-0

Extraction

i try to regex match string like these examples:

NetTAP IPX C-4-16
SmartTAP DP6409 Dual E1-11-16

but not these ones:

NetTAP IPX C-4-16-0
SmartTAP DP6409 Dual E1-11-16-0