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![[1] pry(main)> a = Array.new(3).map { Array.new(3) { Object.new} }
=> [[#<Object:0x007fdd19c595d8>, #<Object:0x007fdd19c595b0>, #<Object:0x007fdd19c59588>],
[#<Object:0x007fdd19c59538>, #<Object:0x007fdd19c59510>, #<Object:0x007fdd19c594e8>],
[#<Object:0x007fdd19c59498>, #<Object:0x007fdd19c59470>, #<Object:0x007fdd19c59448>]]
[2] pry(main)> b = a.clone
=> [[#<Object:0x007fdd19c595d8>, #<Object:0x007fdd19c595b0>, #<Object:0x007fdd19c59588>],
[#<Object:0x007fdd19c59538>, #<Object:0x007fdd19c59510>, #<Object:0x007fdd19c594e8>],
[#<Object:0x007fdd19c59498>, #<Object:0x007fdd19c59470>, #<Object:0x007fdd19c59448>]]
上記のようにcloneだと、コピー元とコピー先
のオブジェクトが同じになってしまう](https://image.slidesharecdn.com/lifegame-141221083240-conversion-gate02/75/slide-17-2048.jpg)
![[1] pry(main)> a = Array.new(3).map { Array.new(3) { Object.new} }
=> [[#<Object:0x007fdd19c595d8>, #<Object:0x007fdd19c595b0>, #<Object:0x007fdd19c59588>],
[#<Object:0x007fdd19c59538>, #<Object:0x007fdd19c59510>, #<Object:0x007fdd19c594e8>],
[#<Object:0x007fdd19c59498>, #<Object:0x007fdd19c59470>, #<Object:0x007fdd19c59448>]]
[6] pry(main)> b = Marshal.load(Marshal.dump(a))
=> [[#<Object:0x007fdd1d2d5eb8>, #<Object:0x007fdd1d2d5e90>, #<Object:0x007fdd1d2d5e68>],
[#<Object:0x007fdd1d2d5e18>, #<Object:0x007fdd1d2d5df0>, #<Object:0x007fdd1d2d5dc8>],
[#<Object:0x007fdd1d2d5d78>, #<Object:0x007fdd1d2d5d50>, #<Object:0x007fdd1d2d5d28>]]
Marshalを使うことによって、コピー元とコ
ピー先のオブジェクトが別物になる](https://image.slidesharecdn.com/lifegame-141221083240-conversion-gate02/75/slide-18-2048.jpg)
ライフゲーム最後まで作ってみました
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- 17. [1] pry(main)> a= Array.new(3).map { Array.new(3) { Object.new} } => [[#<Object:0x007fdd19c595d8>, #<Object:0x007fdd19c595b0>, #<Object:0x007fdd19c59588>], [#<Object:0x007fdd19c59538>, #<Object:0x007fdd19c59510>, #<Object:0x007fdd19c594e8>], [#<Object:0x007fdd19c59498>, #<Object:0x007fdd19c59470>, #<Object:0x007fdd19c59448>]] [2] pry(main)> b = a.clone => [[#<Object:0x007fdd19c595d8>, #<Object:0x007fdd19c595b0>, #<Object:0x007fdd19c59588>], [#<Object:0x007fdd19c59538>, #<Object:0x007fdd19c59510>, #<Object:0x007fdd19c594e8>], [#<Object:0x007fdd19c59498>, #<Object:0x007fdd19c59470>, #<Object:0x007fdd19c59448>]] 上記のようにcloneだと、コピー元とコピー先 のオブジェクトが同じになってしまう
- 18. [1] pry(main)> a= Array.new(3).map { Array.new(3) { Object.new} } => [[#<Object:0x007fdd19c595d8>, #<Object:0x007fdd19c595b0>, #<Object:0x007fdd19c59588>], [#<Object:0x007fdd19c59538>, #<Object:0x007fdd19c59510>, #<Object:0x007fdd19c594e8>], [#<Object:0x007fdd19c59498>, #<Object:0x007fdd19c59470>, #<Object:0x007fdd19c59448>]] [6] pry(main)> b = Marshal.load(Marshal.dump(a)) => [[#<Object:0x007fdd1d2d5eb8>, #<Object:0x007fdd1d2d5e90>, #<Object:0x007fdd1d2d5e68>], [#<Object:0x007fdd1d2d5e18>, #<Object:0x007fdd1d2d5df0>, #<Object:0x007fdd1d2d5dc8>], [#<Object:0x007fdd1d2d5d78>, #<Object:0x007fdd1d2d5d50>, #<Object:0x007fdd1d2d5d28>]] Marshalを使うことによって、コピー元とコ ピー先のオブジェクトが別物になる
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