use strict;
use warnings;

my @arr = qw{ 1 1 0 2 0 1 3 0 0 4 1 1 5 7 };

sub {
        local $" = q{,};
        print qq{@{ [ grep defined, map shift, 1 .. 3 ] }\n} while @_;
    }->( @arr );

print qq{@arr\n};