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December 19, 2015 11:09
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| DICTIONARY = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789".split("") | |
| encode = (i) -> | |
| return DICTIONARY[0] if i is 0 | |
| result = "" | |
| base = DICTIONARY.length | |
| while i > 0 | |
| result += DICTIONARY[(i % base)] | |
| i = Math.floor(i / base) | |
| result.split("").reverse().join "" | |
| decode = (input) -> | |
| i = 0 | |
| base = DICTIONARY.length | |
| input.split("").forEach (c) -> | |
| i = i * base + DICTIONARY.indexOf(c) | |
| i |
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License: MIT License
From:
http://jsdo.it/rfkrocktk/k9Jq
http://stackoverflow.com/questions/742013/how-to-code-a-url-shortener