Created
March 27, 2019 07:19
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Ruby Array.new
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| collection = Array.new(3, 'abc') | |
| collection[0] << 'd' | |
| # all collection item changed, because item value is references | |
| collection # => ['abcd', 'abcd', 'abcd'] | |
| collection = Array.new(3) { 'abc' } | |
| collection[0] << 'd' | |
| # pass a block, block executed 3 times, each time "abc" is new string not references | |
| collection # => ['abcd', 'abc', 'abc'] |
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