Created
February 25, 2013 14:04
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Swap variables values without the use of a third trivial interview question.
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| // set the initial values | |
| $a = 100; | |
| $b = 200; | |
| // swap them! | |
| $a = $a + $b; // $a == 300 | |
| $b = $a - $b; // $b == 100 | |
| $a = $a - $b; // $a == 200 | |
| // done! | |
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