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  1. gsub('.*?(\\d+)(?![^\\r\\n\\d]*\\d).*$', '\\1', 'Happy 2022 New 01 years!',perl=TRUE)
Success #stdin #stdout 0.31s 39116KB
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[1] "01"
https://ideone.com/DBffAO
language:
R (R 3.5.2)
created:
3 years ago
visibility:
public

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