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Re: return file descriptor from function

by johngg (Abbot)
on Aug 10, 2013 at 19:07 UTC ( #1048930=note: print w/replies, xml ) Need Help??

in reply to return file descriptor from function

Use a lexical filehandle and pass it back, it behaves just as a scalar.

$ cat > rubbish sdfhi rtrthr dgdf $ perl -Mstrict -Mwarnings -e ' > my $file = q{rubbish}; > my $fh = openFunc( $file ); > print while <$fh>; > > sub openFunc > { > my $fileToOpen = shift; > open my $fileHandle, q{<}, $fileToOpen > or die qq{open: $fileToOpen: $!\n}; > return $fileHandle; > }' sdfhi rtrthr dgdf $

I hope this was what you meant from your rather terse question and that I have answered your question.



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Re^2: return file descriptor from function
by Laurent_R (Canon) on Aug 10, 2013 at 22:48 UTC

    Although the question was terse, I think that is what the OP most probably meant. And yes, using a lexical filehandle enables you to use it almost as any scalar variable: to pass it to a function, to return it from a function, to take a reference to it, to store it in an array of filehandles or in a hash, to make it a local persistent object in a closure, etc., even if you don't know or don't want to know anything on typeglobs.

Re^2: return file descriptor from function
by solomon243 (Novice) on Aug 12, 2013 at 08:34 UTC
    Ok. This is what I need. Thanks for answers.

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