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perl: add PCRE one liner example (#3129)

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Zachary Sherwin 2019-09-24 06:00:09 -07:00 • committed by Marco Bonelli
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pages/common/perl.md
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@ -30,3 +30,7 @@
- Run a multi-line find/replace expression on a file, and save the result in another file: - Run a multi-line find/replace expression on a file, and save the result in another file:
`perl -p0e 's/{{foo\nbar}}/{{foobar}}/g' {{input_file}} > {{output_file}}` `perl -p0e 's/{{foo\nbar}}/{{foobar}}/g' {{input_file}} > {{output_file}}`
- Run a regular expression on `stdin`, printing out first capture group for each line:
`cat {{path/to/input_file}} | perl -nle 'if (/.*({{foo}}).*/) {print "$1"; last;}'`