Regex, That Matches No more Than n Occurrences
Use the {m,n}
syntax (if your environment provides it, which it likely does.
{m,n}
allows m
to n
(inclusive) occurrences of the previous character.
Examples:
/a{0,3}/
matches 0 to 3 occurrences of a
.
/a{3,}/
matches 3 or more occurrences.
/a{3}/
matches exactly 3 occurrences.
In the following example I've paired the above syntax with negative lookahead and negative lookbehind.
(?<!a)a{0,3}(?!a)
matches 0 to 3 occurrences of a
where there is no a
before or after those 0-3 occurrences.
Admin
Updated on June 13, 2022Comments
-
Admin almost 2 years
I'm trying to find a Regex, that matches no more than n consecutive, say three, for example, occurrences of a character; in the case of three and character is "a":
abbaa - matches;
ammaaa - doesn't match(three consecutive a's), there is one "a", but whole expression must be discarded because three "a's"Thank you.