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  1. library(stringr)
  2. str = c("2019/01/01/07/556662_cba3a4fc-cb8f-4150-859f-5f21a38373d0")
  3. str_match(str, "/([^_/]+)_[^/\\s]*")[,2]
  4.  
  5. # [1] "556662"
Success #stdin #stdout 0.21s 190528KB
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[1] "556662"
https://ideone.com/AM8jXX
language:
R (R 3.5.2)
created:
6 years ago
visibility:
public

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