Ruby 赋值、浅拷贝和深拷贝

arr = ['arr',1,2,3]
a = [arr,'str_a']
b = [arr,'str_b']
c = [arr,'str_c']
d = [arr,'str_d']

# 对象引用
aa = a
# 浅拷贝
bb = b.clone
cc = c.dup
# 深拷贝
dd = Marshal.load(Marshal.dump(d))


a.push('push_a')
b.push('push_b')
c.push('push_c')
d.push('push_d')
arr.push('push_arr')

p a,aa
puts "\n"
p b,bb
puts "\n"
p c,cc
puts "\n"
p d,dd

=begin
[["arr", 1, 2, 3, "push_arr"], "str_a", "push_a"]
[["arr", 1, 2, 3, "push_arr"], "str_a", "push_a"]

[["arr", 1, 2, 3, "push_arr"], "str_b", "push_b"]
[["arr", 1, 2, 3, "push_arr"], "str_b"]

[["arr", 1, 2, 3, "push_arr"], "str_c", "push_c"]
[["arr", 1, 2, 3, "push_arr"], "str_c"]

[["arr", 1, 2, 3, "push_arr"], "str_d", "push_d"]
[["arr", 1, 2, 3], "str_d"]
=end