On Mon, Sep 27, 2010 at 7:29 PM, Gabor Grothendieck
<ggrothendi...@gmail.com> wrote:
> Try this zero width negative look behind expression:
>
>> gregexpr("(?!a+)(b+)", "abcdaabbc", perl = TRUE)
> [[1]]
> [1] 2 7
> attr(,"match.length")
> [1] 1 2
Thanks Gabor, but this gives me the same result as
gregexpr("b+", "abcdaabbc", perl = TRUE)
which is wrong if the string is "abcdaabbcbbb".
Titus
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