正则表达式字符串零或更多

Question

I have follow Regex:

(.*?)( EUR)\1*

and on String 2 mm; EUR it matches 2mm; and EUR but the String 2 mm; matches nothing!?

But why ? I thought the * meant zero or more times? Can you help me? Thank you!

Answer 1

It would have been a better approach to tell what result you want.

If you want a Regex to match "2 mm; EUR" or "2 mm;", it implies that you want to match a string starting with some kind of number (might be a millimiter length? something like that), ending with a ";" and eventually followed by the string " EUR".

If it is what you want, your regex should have a ";" inside and mark EUR with a "?" (0 or 1)

([
]+ .*?);( EUR)?