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  1. s <- "aaehhhhhhhaannd"
  2. strsplit(s, "(?<=(.))(?!\\1)", perl=TRUE)
Success #stdin #stdout 0.2s 175424KB
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[[1]]
[1] "aa"      "e"       "hhhhhhh" "aa"      "nn"      "d"
https://ideone.com/S7OHuu
language:
R (R 3.5.2)
created:
8 years ago
visibility:
secret

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