2025-03-14 21:59:59 -06:00
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# perl
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> The Perl 5 language interpreter.
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2025-12-16 10:20:31 -07:00
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> See also: `perldoc`.
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> More information: <https://perldoc.perl.org/perl>.
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2025-03-14 21:59:59 -06:00
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2025-12-16 10:20:31 -07:00
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- Print lines from `stdin` [m]atching `regex1` and case [i]nsensitive `regex2`:
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2025-03-14 21:59:59 -06:00
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2025-12-16 10:20:31 -07:00
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`perl -n -e 'print if m/regex1/ and m/regex2/i'`
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2025-03-14 21:59:59 -06:00
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2025-12-16 10:20:31 -07:00
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- Say ([-E]) first match group, using a `regex`, ignoring space ([x]) in `regex`:
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2025-03-14 21:59:59 -06:00
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2025-07-24 22:27:13 -06:00
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`perl -n -E 'say $1 if m/{{before}} ( {{group_regex}} ) {{after}}/x'`
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2025-03-14 21:59:59 -06:00
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2025-12-16 10:20:31 -07:00
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- [i]n-place, with backup, [s]ubstitute all occurrence ([g]) of `regex` with a replacement:
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2025-03-14 21:59:59 -06:00
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2025-12-16 10:20:31 -07:00
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`perl -i'.bak' -p -e 's/regex/{{replacement}}/g' {{path/to/files}}`
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