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  1. library(stringr)
  2. x <- "abc[[+de.f[-[[g"
  3. str_extract_all(x, "[a-z.]+|\\[+|[+-]")
  4.  
Success #stdin #stdout 0.22s 190528KB
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Standard input is empty
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[[1]]
[1] "abc"  "[["   "+"    "de.f" "["    "-"    "[["   "g"
https://ideone.com/pmNwwy
language:
R (R 3.5.2)
created:
6 years ago
visibility:
public

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