正则表达式 - 保存重复捕获的组
这就是我正在做的
a = "%span.rockets#diamonds.ribbons.forever"
a = a.match(/(^\%\w+)([\.|\#]\w+)+/)
puts a.inspect
这就是我得到的
#<MatchData "%span.rockets#diamonds.ribbons.forever" 1:"%span" 2:".forever">
这就是我想要
#<MatchData "%span.rockets#diamonds.ribbons.forever" 1:"%span" 2:".rockets" 3:".#diamonds" 4:".ribbons" 5:".forever">
帮助？我尝试过但失败了:(
This is what I'm doing
a = "%span.rockets#diamonds.ribbons.forever"
a = a.match(/(^\%\w+)([\.|\#]\w+)+/)
puts a.inspect
This is what I get
#<MatchData "%span.rockets#diamonds.ribbons.forever" 1:"%span" 2:".forever">
This is what I want
#<MatchData "%span.rockets#diamonds.ribbons.forever" 1:"%span" 2:".rockets" 3:".#diamonds" 4:".ribbons" 5:".forever">
help? I tried and failed :(
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一般来说，您无法获得任意数量的捕获组，但如果您使用
scan，您可以为您想要捕获的每个令牌获得匹配：这不是与您的正则表达式太不同，但我删除了最后一个标记的重复。
\G不太为人所知 - 它告诉引擎匹配上一个匹配结束的位置，因此当匹配之间有额外字符时它不会中断（%span :P .火箭）。一般来说，如果您的原始正则表达式有多个匹配项，则此方法可能会增加一些工作，因为您没有将组分隔为匹配项，但由于
match返回单个结果，因此它应该可以正常工作。工作示例： http://ideone.com/nnmki
Generally, you can't get an arbitrary number of capturing groups, but if you use
scanyou can get a match for every token you want to capture:This isn't too different from your regex, but I removed repetition on the last token.
\Gisn't too well known - it tells the engine to match where the previous match ended, so it doesn't break when you have extra characters between matches (%span :P .rockets).Generally, if you had multiple matches of your original regex this method may add some work, because you don't have the groups separated to matches, but since
matchreturns a single result it should work fine.Working example: http://ideone.com/nnmki
这就是捕获组的工作原理。如果您想保存所有这些子字符串，请将量词放在捕获组中：
然后您的第二个捕获将是：
...您可以自己分解其余部分。
That's just how capturing groups work. If you want to save all of those substrings, put the quantifier inside the capturing group:
Then your second capture will be:
...and you can break it down the rest of the way yourself.