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  1. library(stringr)
  2. s <- "-+?="
  3. str_replace_all(s, "([\\p{P}\\p{S}])(?=[\\p{P}\\p{S}])", "\\1 ")
  4. str_replace_all(s, "(?<=[\\p{P}\\p{S}])(?=[\\p{P}\\p{S}])", " ")
  5. gsub("(?<=[[:punct:]])(?=[[:punct:]])", " ", s, perl=TRUE)
Success #stdin #stdout 0.3s 42860KB
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Standard input is empty
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[1] "- + ? ="
[1] "- + ? ="
[1] "- + ? ="
https://ideone.com/7DVH4x
language:
R (R 3.5.2)
created:
2 years ago
visibility:
secret

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