Ruby:如何为Arrays和Hashes制作IRB打印结构

require 'pp'

array = [1, 2, 3, {a: 1, b: 2}]
hash = {a: 1, b: 2, c: [1, 2, 3]}

pp array
pp hash

[1, 2, 3, {:a=>1, :b=>2}]
{:a=>1, :b=>2, :c=>[1, 2, 3]}