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  1. Face <- c("cK0521d07.png","ck0101a02.png","ck0221c01.png","ck0121b01.png","ck0221g08.png","ck0321c22.png")
  2. grep("[[:alnum:]]{6}c[[:digit:]]{2}\\.png", Face)
Success #stdin #stdout 0.22s 60752KB
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[1] 3 6
https://ideone.com/MUPgQZ
language:
R (R 3.5.2)
created:
7 years ago
visibility:
secret

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