NAME

List::Util::MaybeXS - List::Util but with Pure Perl fallback

SYNOPSIS

use List::Util::MaybeXS qw(
  reduce any all none notall first reductions

  max maxstr min minstr product sum sum0

  pairs unpairs pairkeys pairvalues pairfirst pairgrep pairmap

  shuffle uniq uniqint uniqnum uniqstr zip mesh
);

DESCRIPTION

This module provides the same functions as List::Util, but falls back to pure perl implementations if the installed List::Util is too old to provide them.

Picking between List::Util's XS accellerated functions and the PP versions is done on a per-sub basis, so using this module should never result in a slowdown over using List::Util directly.

FUNCTIONS

all

any

first

min

max

minstr

maxstr

none

notall

product

reduce

reductions

sum

sum0

shuffle

uniq

uniqnum

uniqint

uniqstr

pairs

unpairs

pairkeys

pairvalues

pairmap

pairgrep

pairfirst

head

tail

zip

zip_longest

zip_shortest

mesh

mesh_longest

mesh_shortest

CONFIGURATION VARIABLES

$RAND

The variables $List::Util::RAND, $List::Util::PP::RAND, and $List::Util::MaybeXS::RAND are all aliased to each other. Any of them will impact both List::Util::PP and List::Util functions.

DIFFERENCES FROM List::Util

As the subs provided are implemented in perl, there are some minor differences with the interface.

@_ in blocks

Inside a callback block (such as any { }), @_ will be empty when using the pure perl implementation. With the XS implementation, the outer @_ will be visible. Under the perl debugger, the XS implementation will also not be able to see the outer @_.

AUTHORS

Graham Knop <haarg@haarg.org>

Paul Evans <leonerd@leonerd.org.uk>

Graham Barr <gbarr@pobox.com>

CONTRIBUTORS

None so far.

COPYRIGHT

Copyright (c) 2017 the List::Util::MaybeXS "AUTHORS" and "CONTRIBUTORS" as listed above.

LICENSE

This library is free software and may be distributed under the same terms as perl itself. See http://dev.perl.org/licenses/.