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  1. p <- "(г\\.\\s*[[:alpha:]]+)(?:,\\s*\\1)+"
  2. x <- "г. Воронеж, г. Воронеж, г. Воронеж, ул. Ленинский пр-т,174"
  3. gsub(p,"\\1", x, ignore.case = TRUE)
Success #stdin #stdout 0.22s 60752KB
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[1] "г. Воронеж, ул. Ленинский пр-т,174"
https://ideone.com/IaNebl
language:
R (R 3.5.2)
created:
7 years ago
visibility:
secret

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