摘要: 正则表达式的先行断言和后行断言一共有4种形式:(?=pattern) 零宽正向先行断言(zero-width positive lookahead assertion)(?!pattern) 零宽负向先行断言(zero-width negative lookahead assertion)(?<=p... 阅读全文
posted @ 2015-02-06 22:28 CHIPER 阅读(8274) 评论(1) 推荐(2) 编辑