08-10-2006
Select ALL in VI Editor
Hi all,
How can i select all and copy text in VI Editor.
Rakesh Gupta
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LEARN ABOUT DEBIAN
io::async::loop::select
IO::Async::Loop::Select(3pm) User Contributed Perl Documentation IO::Async::Loop::Select(3pm)
NAME
"IO::Async::Loop::Select" - use "IO::Async" with "select(2)"
SYNOPSIS
Normally an instance of this class would not be directly constructed by a program. It may however, be useful for runinng IO::Async with an
existing program already using a "select" call.
use IO::Async::Loop::Select;
my $loop = IO::Async::Loop::Select->new;
$loop->add( ... );
while(1) {
my ( $rvec, $wvec, $evec ) = ('') x 3;
my $timeout;
$loop->pre_select( $rvec, $wvec, $evec, $timeout );
...
my $ret = select( $rvec, $wvec, $evec, $timeout );
...
$loop->post_select( $rvec, $evec, $wvec );
}
DESCRIPTION
This subclass of "IO::Async::Loop" uses the select(2) syscall to perform read-ready and write-ready tests.
To integrate with an existing "select"-based event loop, a pair of methods "pre_select" and "post_select" can be called immediately before
and after a "select" call. The relevant bits in the read-ready, write-ready and exceptional-state bitvectors are set by the "pre_select"
method, and tested by the "post_select" method to pick which event callbacks to invoke.
CONSTRUCTOR
$loop = IO::Async::Loop::Select->new
This function returns a new instance of a "IO::Async::Loop::Select" object. It takes no special arguments.
METHODS
$loop->pre_select( $readvec, $writevec, $exceptvec, $timeout )
This method prepares the bitvectors for a "select" call, setting the bits that the Loop is interested in. It will also adjust the $timeout
value if appropriate, reducing it if the next event timeout the Loop requires is sooner than the current value.
$readvec
$writevec
$exceptvec
Scalar references to the reading, writing and exception bitvectors
$timeout
Scalar reference to the timeout value
$loop->post_select( $readvec, $writevec, $exceptvec )
This method checks the returned bitvectors from a "select" call, and calls any of the callbacks that are appropriate.
$readvec
$writevec
$exceptvec
Scalars containing the read-ready, write-ready and exception bitvectors
$count = $loop->loop_once( $timeout )
This method calls the "pre_select" method to prepare the bitvectors for a "select" syscall, performs it, then calls "post_select" to
process the result. It returns the total number of callbacks invoked by the "post_select" method, or "undef" if the underlying select(2)
syscall returned an error.
SEE ALSO
o IO::Select - OO interface to select system call
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2012-10-24 IO::Async::Loop::Select(3pm)