A slightly simplified version:

@a = 'a'..'z';;
@b = sub{ map pop, @_ }->( @a );;

print @b;;
z y x w v u t s r q p o n m l k j i h g f e d c b a
[download]

Or even just:

@c = map pop @a, @a;;

print @c;;
z y x w v u t s r q p o n m l k j i h g f e d c b a
[download]

@c = map pop @a, @a;;

Much simpler, true, but destructive if that is a concern.

johngg@shiraz:~/perl > perl -Mstrict -Mwarnings -E '
my @arr = ( q{a} .. q{z} );
my @rev = map pop @arr, @arr;
say qq{@arr};
say qq{@rev};'

z y x w v u t s r q p o n m l k j i h g f e d c b a
[download]

Cheers,

JohnGG

but destructive if that is a concern.

True. Then:

@a = 'a'..'z';;
unshift @d, $_ for @a;;

print @d;;
z y x w v u t s r q p o n m l k j i h g f e d c b a

print @a;;
a b c d e f g h i j k l m n o p q r s t u v w x y z
[download]

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