日々の破片

_ 循環配列

require 'stringio'
a = [1, 2, 3]
a << a
p a
b = [a]
a << b
p a
b << a
p b
x = ""
s = StringIO.new(x)
Marshal.dump(a, s)
s.close
p x
s = StringIO.new(x)
na = Marshal.load(s)
p na

C:?home?tmp>ruby ar.rb
[1, 2, 3, [...]]
[1, 2, 3, [...], [[...]]
[[1, 2, 3, [...], [...]], [1, 2, 3, [...], [...]]]
"?x04?b[?ni?x06i?ai?b@?x00[?a@?x00@?x00"
[1, 2, 3, [...], [[...], [...]]]