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August 29, 2015 13:58
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| foo = %w(a b c) | |
| => ["a", "b", "c"] | |
| foo.object_id | |
| => 2176910900 | |
| foo += ['d'] | |
| => ["a", "b", "c", "d"] | |
| foo.object_id | |
| => 2176867500 | |
| foo = %w(a b c) | |
| => ["a", "b", "c"] | |
| foo.object_id | |
| => 2172617680 | |
| foo.concat(['d']) | |
| => ["a", "b", "c", "d"] | |
| foo.object_id | |
| => 2172617680 |
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