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Re: -pi -e argv repeater

by ikegami (Patriarch)
on Feb 02, 2007 at 15:45 UTC ( #597951=note: print w/replies, xml ) Need Help??

in reply to -pi -e argv repeater

Perhaps you'd like

use constant PIE_NO_BACKUP => ''; sub pie(&$@) { ( my $code, # Code ref local $^I, # PIE_NO_BACKUP, '~', '.bak', etc local @ARGV, ) = @_; local *_; # Protect caller's $_. while (<>) { chomp; $code->(); print($_, "\n"); } } # perl -i -pe 's///' file1 file2 pie { s/// } PIE_NO_BACKUP, 'file1', 'file2'; # perl -i.bak -pe 's///' file? data*.txt pie { s/// } '.bak', map { bsd_glob($_) } 'file?', 'data*.txt';


Update: Added missing "\n". Created constant for no backup. Added local *_;.

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Re^2: -pi -e argv repeater
by jettero (Monsignor) on Feb 02, 2007 at 15:57 UTC

    $^I is apparently all I needed. I had no idea it would be so simple, thanks. I obviously should have just asked on the chatterbox... how embarassing.


Re^2: -pi -e argv repeater
by OfficeLinebacker (Chaplain) on Feb 03, 2007 at 19:08 UTC
    May I ask what the (&$@) in the sub declaration is for?

    I like computer programming because it's like Legos for the mind.

      It's a prototype.

      Without the prototype, you'd have to do
      pie sub { CODE }, SCALAR, LIST
      pie &func, SCALAR, LIST

      With the prototype, you can also do
      pie { CODE } SCALAR, LIST

        I see you disagree with Damian Conway (as expressed in Perl Best Practices--pp 194-196 for those of you following from home). I wish I understood better the exact thought processes behind each of your approaches.

        Either way, yes, $^I is the way to go (or, if you really want to be a Boy Scout about it, use English, only without the evil regexp vars, and use $INPLACE_EDIT in place of $^I).

        I like computer programming because it's like Legos for the mind.

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