Created
November 19, 2013 15:22
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.each vs .collect
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| [1, 2, 3, 4].each { |x| x*2 } | |
| #=> [1, 2, 3, 4] | |
| [1, 2, 3, 4].each { |x| print x*2 } | |
| #=> 2468 => [1, 2, 3, 4] | |
| [1, 2, 3, 4].collect { |x| x*2 } | |
| #=> [2, 4, 6, 8] | |
| [1, 2, 3, 4].each { |x| x*2 } | |
| #=> 2468 [nil, nil, nil, nil] |
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