#!/usr/bin/env perl
use Modern::Perl;

sub evens {
    return grep { ! ($_ % 2) } @_;
}
say for evens(1..10);

##</code><code>##

#!/usr/bin/env perl
use Modern::Perl;

sub squares {
    my $n = shift;
    $_ *= $_ for @$n;
}

my @nums = (1..10);
squares(\@nums);
say for @nums;

##</code><code>##

#!/usr/bin/env perl
use Modern::Perl;

sub huge {
    my $n = shift;
    return 1 if $n and $n > 1_000_000;
    return ! $n; # reverse the t/f for all other cases
}

for (-1,0,1,100,1_000_000, 1_000_001){
    my $t = huge($_) ? 'true' : 'false';
    say "$_ $t";
}