Regex - only matching wildcard of a certain length or less

问题

Is there a way to have a Regex statement search for a wildcard with a maximum length? For instance:

somestuff.*morestuff

If I wanted the above to match

somestuffblahmorestuff

but not

somestuffblahblahmorestuff

Is this possible?

回答1:

To match a known length use .{2,5} where the 2 is the minimum number of characters and 5 is the max. both values are optional but you do need one or the other

More can be read on this topic here

回答2:

in regex:

{n} Matches the previous element exactly n times.

{n,} Matches the previous element at least n times.

{n,m} Matches the previous element at least n times, but no more than m times.

for example:

,\d{3} matches ,876, ,543, and ,210 in 9,876,543,210

\d{2,} matches 166, 29, 1930

\d{3,5} matches 19302 in 193024

回答3:

somestuff.{4,7}morestuff

{min, max} is the syntax to specify the number of repetition.

来源：https://stackoverflow.com/questions/17120249/regex-only-matching-wildcard-of-a-certain-length-or-less