challenge-258/dave-jacoby/perl/ch-1.pl


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#!/usr/bin/env perl

use strict;
use warnings;
use experimental qw{ say postderef signatures state };

my @examples = (

    [ 10,  1, 111, 24, 1000 ],
    [ 111, 1, 11111 ],
    [ 2,   8, 1024, 256 ],
);

for my $example (@examples) {
    my $output = scalar grep { ( length $_ ) % 2 == 0 } $example->@*;
    my $ints   = join ', ', $example->@*;

    say <<~"END";
    Input:  \@ints = ($ints)
    Output: $output
    END
}