https://github.com/sysread/skewheap

A fast, efficient, self-adjusting heap for Perl, implemented in C
https://github.com/sysread/skewheap

c data-structures heap perl skew-heap xs

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A fast, efficient, self-adjusting heap for Perl, implemented in C

• Host: GitHub
• URL: https://github.com/sysread/skewheap
• Owner: sysread
• Created: 2018-03-20T19:46:06.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2018-08-26T17:27:12.000Z (over 6 years ago)
• Last Synced: 2023-08-20T23:10:03.264Z (over 1 year ago)
• Topics: c, data-structures, heap, perl, skew-heap, xs
• Language: XS
• Size: 72.3 KB
• Stars: 1
• Watchers: 3
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.pod
  • Changelog: Changes

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README

        
=head1 NAME

SkewHeap - A fast and flexible heap structure

=head1 SYNOPSIS

  use SkewHeap;

  my $heap = skewheap{ $a <=> $b };

  $heap->put(42);

  $heap->put(35);

  $heap->put(200, 62);

  $heap->top;  # 35

  $heap->size; # 4

  $heap->take; # 35

  $heap->take; # 42

  $heap->take; # 62

  $heap->take; # 200

  my $merged_heap = $heap->merge($other_skewheap);

=head1 DESCRIPTION

A skew heap is a memory efficient, self-adjusting heap (or priority queue) with

an amortized performance of O(log n) (or better). C is implemented in

C/C.

The key feature of a skew heap is the ability to quickly and efficiently merge

two heaps together.

=head1 METHODS

=head2 skewheap

Creates a new C which will be sorted in ascending order using the

comparison subroutine passed in. This sub has the same semantics as Perl's

C, returning -1 if C<$a E $b>, 1 if C<$a E $b>, or 0 if

C<$a == $b>.

=head2 size

Returns the number of elements in the heap.

=head2 top

Returns the next element which would be returned by L without removing

it from the heap.

=head2 put

Inserts one or more new elements into the heap.

=head2 take

Removes and returns the next element from the heap.

=head2 merge

Non-destructively merges two heaps into a new heap. Returns the new heap.

=head1 AUTHOR

Jeff Ober 

=head1 COPYRIGHT AND LICENSE

This software is copyright (c) 2018 by Jeff Ober. This is free software; you

can redistribute it and/or modify it under the same terms as the Perl 5

programming language system itself.