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  1. names <- c("plan_x_template", "plan_x")
  2. grep("^plan(?!.*template)", 
  3.   names, 
  4.   value = TRUE, perl = TRUE
  5. )
Success #stdin #stdout 0.29s 39508KB
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[1] "plan_x"
https://ideone.com/qFyCAr
language:
R (R 3.5.2)
created:
7 years ago
visibility:
secret

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