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  1. x <- c("lkas32kj_123_3.21", "lkas32kj_123_3.21|l3kj_12_0.21|123e_4_32.1", "+++NO+++")
  2. rx <- "[[:alnum:]]+(?:_\\d+){2}(?:\\.\\d+)?"
  3. grepl(paste0("^", rx, "(?:\\|", rx ,")*$"), x)
  4.  
Success #stdin #stdout 0.23s 183680KB
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[1]  TRUE  TRUE FALSE
https://ideone.com/LxitNm
language:
R (R 3.5.2)
created:
4 years ago
visibility:
secret

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