正则表达式问题
给定以下类型的字符串：
“#First Thing# #Another One##No Space# Main String #After Main# #EndString#”
我想提出一个正则表达式，可以返回 # 包围的所有文本符号作为匹配。让我悲伤的事情之一是 # 符号既是开始分隔符又是结束分隔符。我对正则表达式的所有尝试都只是返回了整个字符串。另一个问题是字符串的一部分可能没有被 # 符号包围，如上面的子字符串“Main String”所示。有人有什么想法吗？我已经尝试过一些消极的后向断言，但还没有能够让它发挥作用。 # 组之间可能有也可能没有空格，但如果有的话我想忽略它们（不与它们匹配）。另一种选择是只编写一个字符串解析器例程，这将相当容易，但如果可能的话，我更愿意使用正则表达式。
Given the following type of string:
"#First Thing# #Another One##No Space# Main String #After Main# #EndString#"
I would like to come up with a regular expression that can return all the text surrounded by the # symbols as matches. One of the things giving me grief is the fact that the # symbol is both the opening and closing delimiter. All of my attempts at a regex have just returned the entire string. The other issue is that it is possible for part of the string to not be surrounded by # symbols, as shown by the substring "Main String" above. Does anyone have any ideas? I have toyed around with Negative Look-behind assertion a bit, but haven't been able to get it to work. There may or may not be a space in between the groups of #'s but I want to ignore them (not match against them) if there are. The other option would be to just write a string parser routine, which would be fairly easy, but I would prefer to use a regex if possible.
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评论（3）
也许像上面这样的东西会符合你的要求。
这将匹配两个哈希值之间的空格。唔。
我认为这将消除令人讨厌的空间。
Perhaps something like the above will match what you want.
This will match the space in between two hashes. Hmm.
That will get rid of the nasty space, I think.
[编辑]
我认为这就是您所需要的：
输入
#First Thing# #Another One##No Space# Main String #After Main#匹配：First ThingAnother OneNo SpaceMain StringAfter Main第二个匹配是之间的空格
Thing#和#Another。[编辑] 忽略空格：
如果你想忽略尾随空格：
[Edit]
I think that this is what you need:
With input
#First Thing# #Another One##No Space# Main String #After Main#matches:First ThingAnother OneNo SpaceMain StringAfter MainThe second match is the space between
Thing#and#Another.[EDIT] To ignore space:
If you want to ignore trailing spaces:
试试这个。不应捕获第一个和最后一个组，并且 .*?应该是懒惰
我认为这是你真正需要的：
但它不会捕获
#周围的Main StringTry this. The first and last groups should not be captured and the .*? should be lazy
I think this is what you really need:
but it will not capture the
#'s aroundMain String