Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:.*?(\d{1,2}-\d{1,2}-\d{2}(?:\d{2})?)){2}

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

.*?any character (except for line terminators), repeated any number of times

Group 1(\d{1,2}-\d{1,2}-\d{2}(?:\d{2})?)

\d{1,2}a digit, repeated between 1 and 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

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

?repeats the group contents below at most once:

\d{2}a digit, repeated exactly 2 times

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{1,2}-\d{1,2}-\d{2}(?:\d{2})?)){2}

New

"1-8-2018 en 1-2-2019
"26-3-19 en 23-4-2019
"1-1-20 of 8-2-20 en dan 12-10-20

"1-8-2018 en 1-2-2019
"26-3-19 en 23-4-2019
"1-1-20 of 8-2-20 en dan 12-10-20