File Coverage

blib/lib/List/Util/sglice.pm

Criterion	Covered	Total	%
statement	35	36	97.2
branch	16	18	88.8
condition			n/a
subroutine	4	4	100.0
pod	1	1	100.0
total	56	59	94.9

package List::Util::sglice;

use strict;
use warnings;

use Exporter 'import';

our $AUTHORITY = 'cpan:PERLANCAR'; # AUTHORITY
our $DATE = '2023-09-18'; # DATE
our $DIST = 'List-Util-sglice'; # DIST
our $VERSION = '0.001'; # VERSION

our @EXPORT_OK = qw(
                       sglice
                       msplice
               );

sub sglice(&\@;$) { ## no critic: Subroutines::ProhibitSubroutinePrototypes
    my ($code, $array, $num_remove) = @_;

    $num_remove = @$array unless defined $num_remove;

    my @indices;
    if ($num_remove >= 0) {
        for my $index (0 .. $#{$array}) {
            goto REMOVE if @indices >= $num_remove;
            if (do { local $_ = $array->[$index]; $code->($_, $index) }) {
                push @indices, $index;
            }
        }
    } else {
        for my $index (reverse 0 .. $#{$array}) {
            goto REMOVE if @indices >= -$num_remove;
            if (do { local $_ = $array->[$index]; $code->($_, $index) }) {
                unshift @indices, $index;
            }
        }
    }

    return unless @indices;

  REMOVE:
    my @removed;
    for my $index (reverse @indices) {
        unshift @removed, splice(@$array, $index, 1);
    }

  RETURN:
    my $wantarray = wantarray;
    if ($wantarray) {
        return @removed;
    } elsif (defined $wantarray) {
        return $removed[-1];
    } else {
        return;
    }
}
1;
# ABSTRACT: Remove some elements where code returns true

__END__