Regular expression quantifier precedence

Quantifier is a priority match, that is, quantifiers will eat as much as possible, until because of eating too many, resulting in the back can not match, just spit out a. For example, text AB1CD2, regular expressions. *[0-9] Matching process: * always eat until 2, found that the number can not match, so the outstanding 2, matching success, the end. That is. * Match AB1CD If I want to let. *[0-9] Match ab1cd2 two times, what should I do? Ignore quantifier precedence,. *? [0-9], the quantifier is appended with a question mark. In other words, let * eat as little as possible. Matching process: * Do not eat, do not eat no, ah, a can not match the number, so eat a, B can not match the number, so eat the next b,1 match number, the end. Start the next match.

Regular expression quantifier precedence