Created
December 30, 2012 12:07
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Gist #2 For "Functional Programming Techniques With Ruby: Part III"
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| fact(6) = 6 * fact(5) | |
| = 6 * 5 * fact(4) | |
| = 6 * 5 * 4 * fact(3) | |
| = 6 * 5 * 4 * 3 * fact(2) | |
| = 6 * 5 * 4 * 3 * 2 * fact(1) | |
| = 6 * 5 * 4 * 3 * 2 * 1 | |
| = 720 |
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