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  1. string <- "0000A0000B0000C0000D0000E0000A0000"
  2. pattern <- c("XXXX")
  3. gsub("(^|[AB])0000", "\\1XXXX", string)
Success #stdin #stdout 0.25s 183680KB
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Standard input is empty
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[1] "XXXXAXXXXBXXXXC0000D0000E0000AXXXX"
https://ideone.com/cfiHJr
language:
R (R 3.5.2)
created:
5 years ago
visibility:
secret

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