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Merge pull request #23 from linus/patch-1

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Use equivalent regex with PCRE
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Bonnie I-Man Ng 2022-05-08 01:02:27 +08:00 committed by GitHub
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@ -280,7 +280,7 @@ grep -c "^$"
```bash
grep -o '[0-9]*'
#or
grep -oP '\d'
grep -oP '\d*'
```
##### Grep integer with certain number of digits (e.g. 3)
```bash