Created
May 11, 2012 04:13
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| 1.9.2p290 :001 > a = Hash.new([]) | |
| => {} | |
| 1.9.2p290 :002 > a[:b] << 1 | |
| => [1] | |
| 1.9.2p290 :003 > a | |
| => {} | |
| 1.9.2p290 :004 > a[:b] << 2 | |
| => [1, 2] | |
| 1.9.2p290 :005 > a | |
| => {} | |
| 1.9.2p290 :006 > a[:b] | |
| => [1, 2] | |
| 1.9.2p290 :007 > |
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