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  1. text100 <- "My ### is 1234"
  2. gsub("(?<!\\w)\\#+(?!\\w)","hash",text100, perl=T)
  3.  
Success #stdin #stdout 0.45s 22824KB
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Standard input is empty
stdout
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[1] "My hash is 1234"
https://ideone.com/ze1Swy
language:
R (R 3.5.2)
created:
10 years ago
visibility:
secret

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