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Re^4: Get record separator of a file

by davido (Archbishop)
on Nov 14, 2012 at 00:08 UTC ( #1003723=note: print w/replies, xml ) Need Help??

in reply to Re^3: Get record separator of a file
in thread Get record separator of a file

Now we're getting somewhere (I think). You should be able to take advantage of Perl's :crlf IO layer to handle the problem for you. I'll let you test this yourself I've tested this, and here is how I think it would work out.

First, Tie::File seems to be "layers" unaware, which is fine, except that you'll have to open the file explicitly, and close it again when you're done, rather than letting Tie::File handle those operations. This gives you control over what layers are applied to the file handle.

use strict; use warnings; use Tie::File; use Scalar::Util qw( weaken ); open my $fh, '+<:crlf', 'filename.ext' or die $!; my @array; my $t = tie @array, 'Tie::File', $fh; weaken $t; # tie holds its own ref. We don't want a mem leak. # Work, work, work... untie @array; close $fh or die $!;

The relevant explanation of ':crlf' from the POD is: " On read converts pairs of CR,LF to a single "\n" newline character. On write converts each "\n" to a CR,LF pair." Since this happens behind the scenes, it should play nice with Tie::File, but I would test on some copies of the files first to be sure.

Updated: Added weaken to eliminate a potential memory leak, since tie also holds a ref to its own object.


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[SOLVED]Re^5: Get record separator of a file
by karlgoethebier (Monsignor) on Nov 14, 2012 at 13:38 UTC


    Sorry, i saw it to late. Cool, i didn't know this.

    Works when called with $fh. Very nice!

    Thank you very much and best regards, Karl

    «The Crux of the Biscuit is the Apostrophe»

Re^5: Get record separator of a file
by karlgoethebier (Monsignor) on Nov 14, 2012 at 19:00 UTC

    Just thank you very much, Karl

    «The Crux of the Biscuit is the Apostrophe»

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