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Think about Loose Coupling

Re^2: String Buffer

by FunkyMonk (Chancellor)
on Aug 24, 2008 at 15:10 UTC ( #706565=note: print w/replies, xml ) Need Help??

in reply to Re: String Buffer
in thread String Buffer

Or, without using tie:
open my $oldout, ">&STDOUT" or die "Can't dup STDOUT: $!"; my $stdout; close STDOUT; open STDOUT, ">", \$stdout or die $!; # This is where the magic happen +s print "foo\n"; close STDOUT; open STDOUT, ">&", $oldout or die $!; print "Done fooling around\n"; print $stdout; # foo

This is mostly copy & pasted from open, so you might want to look there for more.

Unless I state otherwise, all my code runs with strict and warnings

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Re^3: String Buffer
by ambrus (Abbot) on Aug 25, 2008 at 13:07 UTC

    In fact, that uses a perlio layer silently.

    I've been wishing a perlio layer that allows you to simply open a stream that behaives like any tied handle eg.

    use StringBuffer; use PerlIO::Tied; # Note: never close one of the three standard handles. It's almost alw +ays a bad idea. open OLDSTDOUT, ">&=STDOUT"; open STDOUT, ">:tied(StringBuffer)"; # I presume extra arguments to ti +e get passed as extra argument to open print STDOUT "this magically gets put to \$stdout\n"; open STDOUT, ">&=OLDSTDOUT"; print STDOUT "this gets put to the original standard output again\n";

    This gets even more useful if you want to use a tied io handle from the command line eg. perl -MPerlIO::Tied -we 'some code' ':tied(SomeModule, arguments)'.

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