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December 20, 2015 08:48
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ruby: hash.update()
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| hash1 = {:a=> 1, :b=>2} | |
| hash2 = {} | |
| hash2[:b] = 3 | |
| p hash2 | |
| hash2.update(hash1) | |
| p hash2 | |
| #{:b=>3} | |
| #{:a=>1, :b=>2} |
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