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  1. a <- c("this is a number 9999333333 and i got 12344")
  2. gsub("(?:\\G(?!^)|(?<!\\d)\\d{5})\\K\\d", "X", a, perl=TRUE)
Success #stdin #stdout 0.25s 39184KB
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Standard input is empty
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[1] "this is a number 99993XXXXX and i got 12344"
https://ideone.com/AxkkkG
language:
R (R 3.5.2)
created:
4 years ago
visibility:
secret

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