NAME

List::Util::Find - List utilities related to finding items

VERSION

This document describes version 0.005 of List::Util::Find (from Perl distribution List-Util-Find), released on 2023-09-16.

SYNOPSIS

            

              
              
use List::Util::Find qw(hasnum hasstr);
my @ary = (1,3,"foo",7,2,"bar",10,"baz");
if (hasnum 3, @ary) {
    ...
}
if (hasstr "baz", @ary) {
    ...
}
            
          

DESCRIPTION

Experimental.

FUNCTIONS

Not exported by default but exportable.

hasnum

Usage:

            

              
              
hasnum $num, ...
            
          

Like grep { $_ == $num } ... except: 1) it short-circuits (exits early as soon as an item is found); 2) it makes sure undef does not match; 3) it makes sure non-numeric scalars don't match when $num is zero. It is equivalent to something like:

            

              
              
use List::Util qw(first);
use Scalar::Util qw(looks_like_number);
defined(first { defined && looks_like_number($_) && $_ == $num } @list);
            
          

except it does not use any module.

hasstr

Usage:

            

              
              
hasstr $str, ...
            
          

Like grep { $_ eq $num } ... except: 1) it short-circuits (exits early as soon as an item is found); 2) it makes sure undef does not match empty string. It is equivalent to something like:

            

              
              
use List::Util qw(first);
defined(first { defined && $_ eq $str } @list);
            
          

except it does not use any module.

FAQ

How about hasundef, hasref, hasarrayref, ...?

They are trivial enough:

            

              
              
first { !defined } @list;
first { ref $_ } @list;
first { ref $_ eq 'ARRAY' } @list;
# and so on
            
          

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/List-Util-Find.

SOURCE

Source repository is at https://github.com/perlancar/perl-List-Util-Find.

SEE ALSO

List::Util

AUTHOR

perlancar <perlancar@cpan.org>

CONTRIBUTING

To contribute, you can send patches by email/via RT, or send pull requests on GitHub.

Most of the time, you don't need to build the distribution yourself. You can simply modify the code, then test via:

            

              
              
% prove -l
            
          

If you want to build the distribution (e.g. to try to install it locally on your system), you can install Dist::Zilla, Dist::Zilla::PluginBundle::Author::PERLANCAR, Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE

This software is copyright (c) 2023, 2021 by perlancar <perlancar@cpan.org>.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=List-Util-Find

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

cpanm List::Util::Find

perl -MCPAN -e shell
install List::Util::Find