正则表达式 - 仅匹配一定长度或更短的通配符

Question

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?

Answer 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

Answer 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

Answer 3

somestuff.{4,7}morestuff

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