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  1. gsub("\\d+(?!.*_)", "", "123_123_abc_123-AB-DC-D4G6", perl = TRUE)
Success #stdin #stdout 0.21s 39232KB
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[1] "123_123_abc_-AB-DC-DG"
https://ideone.com/8h9H69
language:
R (R 3.5.2)
created:
4 years ago
visibility:
public

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