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July 14, 2017 04:45
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dupの効能
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| # 参照 | |
| params = { aaa: 123 } | |
| copy_params = params | |
| copy_params[:bbb] = 456 | |
| p params | |
| # dup | |
| params = { aaa: 123 } | |
| copy_params = params.dup | |
| copy_params[:bbb] = 456 | |
| p params |
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