mirror of https://github.com/CrimsonTome/tldr.git
37 lines
1010 B
Markdown
37 lines
1010 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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- Parse and execute a Perl script:
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`perl {{script.pl}}`
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- Check syntax errors on a Perl script:
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`perl -c {{script.pl}}`
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- Parse and execute a Perl statement:
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`perl -e {{perl_statement}}`
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- Run a Perl script in debug mode, using `perldebug`:
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`perl -d {{script.pl}}`
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- Loo[p] over all lines of a file, editing them [i]n-place using a find/replace [e]xpression:
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`perl -p -i -e 's/{{find}}/{{replace}}/g' {{filename}}`
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- Run a find/replace expression on a file, saving the original file with a given extension:
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`perl -p -i'.old' -e 's/{{find}}/{{replace}}/g' {{filename}}`
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- Run a multiline find/replace expression on a file, and save the result in another file:
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`perl -p0e 's/{{foo\nbar}}/{{foobar}}/g' {{input_file}} > {{output_file}}`
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- Run a regular expression on stdin, printing out the first capture group for each line:
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`cat {{path/to/input_file}} | perl -nle 'if (/.*({{foo}}).*/) {print "$1"; last;}'`
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