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  1. x <- c("aaa","aaaa","abababcdcd","cdababcdcd")
  2. gsub("(.{2,})\\1+","\\1",x)
  3. gsub("(.{2,})\\1+","\\1",x, perl=TRUE)
Success #stdin #stdout 0.19s 183680KB
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stdout
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[1] "aaa"        "aa"         "abcd"       "cdababcdcd"
[1] "aaa"    "aa"     "abcd"   "cdabcd"
https://ideone.com/kapxyZ
language:
R (R 3.5.2)
created:
6 years ago
visibility:
secret

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