Regular Expressions 101

Explanation

Pro

Group 1(\d{5}-\d{5})

\d{5}a digit, repeated exactly 5 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{5}a digit, repeated exactly 5 times

Negative Lookahead(?!-000)

-000the literal text -000

Group 2(-\d{3})

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{3}a digit, repeated exactly 3 times

Group 3(0)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

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{5}-\d{5})(?!-000)(-\d{3})(0)

New

12345-12345-1230
12345-12345-000