[R] yet another regular expression

arun smartpink111 at yahoo.com
Mon Jun 30 17:47:06 CEST 2014


Hi Jim,
May be this helps:

library(stringr)
paste(str_extract_all(initString, perl('(?<=\\:)[[:alnum:]]+,?'))[[1]],collapse="")
#[1] "value1,value2"
A.K.




On Monday, June 30, 2014 9:58 AM, Jim Lemon <jim at bitwrit.com.au> wrote:
Hi all,
I have managed, with the help of glob2rx() to get two parts of a text 
manipulation working. I have successfully gotten rid of the first and 
second bits, but I have hit the wall trying to get rid of the last bit. Here's 
an example:

initString<-
"\"Delete this\":value1,\"Delete this too\":value2},Delete last bit"
sub("\"Delete this too\":","",
sub(glob2rx("*this\":*"),"",initString),fixed=TRUE)

This gives me:

[1] "value1,value2},Delete last bit"

and glob2rx("},*") just won't get rid of the last bit. I throw myself upon 
the mercy of the regular expression gurus.

Jim

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