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RegEx: Find string starting with “@”, but not with “@@”

原文 2013-02-11 13:03:55 5 1 c#/ .net/ regex

I need a RegEx to find a string starting with a single "@".

Match: @Hello
No match: @@Hello

I tried "\\B@\\w+" , but it also finds "@@Hello".

Thank you.

1 answers

使用否定的超前构造(?!pattern) ：

^@(?!@)

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