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20 lines
716 B
Markdown
20 lines
716 B
Markdown
# perl
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> The Perl 5 language interpreter.
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> More information: <https://www.perl.org>.
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- Print lines from `stdin` [m/] matching `regex1` and case insensitive [/i] `regex2`:
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`perl -n -e 'print if m/{{regex1}}/ and m/{{regex2}}/i'`
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- Say [-E] first match group, using a `regex`, ignoring space in `regex` [/x]:
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`perl -n -E 'say $1 if m/{{before}} ( {{group_regex}} ) {{after}}/x'`
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- [-i]n-place, with backup, [s/] substitute all occurrence [/g] of `regex` with replacement:
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`perl -i'.bak' -p -e 's/{{regex}}/{{replacement}}/g' {{path/to/files}}`
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- Use perl's inline documentation, some pages also available via manual pages on Linux:
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`perldoc perlrun ; perldoc module ; perldoc -f splice; perldoc -q perlfaq1`
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