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Re: search for a pattern in file without opening the file

by codeacrobat (Chaplain)
on Jan 30, 2007 at 07:18 UTC ( #597304=note: print w/replies, xml ) Need Help??

in reply to search for a pattern in file without opening the file

Let perl do the dirty work and use the implicit loop options -n ( see perlrun ).

Check out Tim Mahers Minimal Perl if you are a unixy person and want perl scripts to work similar to unix tools.

/usr/bin/perl -n BEGIN{ @ARGV=qw(the files you want to process); } push @files, $ARGV and close ARGV if /^pattern/; END{ print "matching files @files\n" }

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[perldigious]: I didn't want to tie up memory unecessarily basically, I wanted to "delete" it specifically to free it up, and wasn't sure I was even accomplishing that.
[stevieb]: perldigious You should start by writing some unit tests. That'll ensure current functionality doesn't break with changes.
[choroba]: unit tests++
[choroba]: The only problem you can't solve by adding more tests is the problem of having too many tests.
[stevieb]: choroba Been there, done that :) Better too many than not enough though!

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