$ perl6 -e 'my @a = 1, 2, 3; push @a, 4; say ~@a'
1 2 3 4
$ perl6 -e 'my @a := 1, 2, 3; push @a, 4; say ~@a'
Method '!fill' not found for invocant of class 'Int'
  in 'List::push' at line 2617:CORE.setting
  in main program body at line 1

##</code><code>##

my @a = gather for 1..3 {
    .say; take $_;
}
say "printing now...";
say ~@a;

# produces

1
2
3
printing now...
1 2 3

##</code><code>##

my @a := gather for 1..3 {
    .say; take $_;
}
say "printing now...";
say ~@a;

# produces
printing now...
1
2
3
1 2 3