DB<17> !1
@a = map +{$_=>[1..3]}, a ..d

  DB<18> x 1 @a
0  HASH(0xa7041080)
1  HASH(0xa70411c0)
2  HASH(0xa70413e0)
3  HASH(0xa6f048c0)
  DB<19> x 2 @a
0  HASH(0xa7041080)
   'a' => ARRAY(0xa70098d0)
1  HASH(0xa70411c0)
   'b' => ARRAY(0xa7027540)
2  HASH(0xa70413e0)
   'c' => ARRAY(0xa7027860)
3  HASH(0xa6f048c0)
   'd' => ARRAY(0xa7041b70)
  DB<20>