Heap::Elem::Ref(3) User Contributed Perl Documentation Heap::Elem::Ref(3)NAMEHeap::Elem::Ref - Object Reference Heap Elements
SYNOPSIS
use Heap::Elem::Ref( RefElem );
use Heap::Fibonacci;
my $heap = Heap::Fibonacci->new;
my $elem;
foreach $i ( 1..100 ) {
$obj = myObject->new( $i );
$elem = RefElem( $obj );
$heap->add( $elem );
}
while( defined( $elem = $heap->extract_top ) ) {
# assume that myObject object have a method I<printable>
print "Smallest is ", $elem->val->printable, "\n";
}
DESCRIPTIONHeap::Elem::Ref is used to wrap object reference values into an element
that can be managed on a heap. Each referenced object must have a
method cmp which can compare itself with any of the other objects that
have references on the same heap. These comparisons must be consistant
with normal arithmetic. The top of the heap will have the smallest
(according to cmp) element still remaining. (See Heap::Elem::RefRev if
you want the heap to always return the largest element.)
The details of the Elem interface are described in Heap::Elem.
The details of using a Heap interface are described in Heap.
AUTHOR
John Macdonald, john@perlwolf.com
COPYRIGHT
Copyright 1998-2007, O'Reilly & Associates.
This code is distributed under the same copyright terms as perl itself.
SEE ALSOHeap(3), Heap::Elem(3), Heap::Elem::RefRev(3).
perl v5.18.2 2007-04-28 Heap::Elem::Ref(3)
