这是句子('Line#:‘不是句子的一部分):Line2: Number 11 is 101, number 21 is 44.567我想在python中构造一个正则表达式,以返回每行的所有数字:Line 2 returns: [11, 101, 21, 44.567]
Line 3 returns: [111, 102, 211,
附加示例:取自关于的第一段Lookahead and lookbehind, collectively called "lookaround", are zero-length assertionsThe difference is that lookaround actually matches characters, but then gives up the match, returningLookaround allows you to create regular expressions that
但是当我想创建一个新的lookaround RegExp时,我遇到了麻烦var regex = new RegExp("(?<!"_on)(.gif|.jpg|.png)$/: Invalid group
我尝试转义后面的所有特殊字符,然后它可以创建一个新的RegExp,但就像一个字符串,而不是一个lookaround正则表达式。