Regex: workaround for variable length negative lookbehind

Wacek Kusnierczyk · 2008-12-01T05:20:48Z

Gabor Grothendieck wrote: > Try this: > > >> vec > > > >> grep("^(?!(.)\\1{1,}$).*(.)\\2{1,}$", vec, perl = TRUE) >> or even grep("^(?!(.)\\1+$).*(.)\\2+$", vec, perl = TRUE) vQ

Wacek Kusnierczyk

Sun, Nov 30, 2008 9:20 PM

Gabor Grothendieck wrote:

or even

grep("^(?!(.)\\1+$).*(.)\\2+$", vec, perl = TRUE)


vQ

Thread (3 messages)

Wacek Kusnierczyk Regex: workaround for variable length negative lookbehind Nov 30 Gabor Grothendieck Regex: workaround for variable length negative lookbehind Dec 1 Wacek Kusnierczyk Regex: workaround for variable length negative lookbehind Dec 1