Created
January 5, 2011 19:25
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/** | |
Based on https://github.com/sinefunc/base62 | |
NOTE: both algorithms differ when decoding big integers: | |
https://skitch.com/jpemberthy/r8hes/screen-shot-2011-01-05-at-1.49.08-pm | |
*/ | |
SIXTYTWO = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", | |
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", | |
"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"] | |
var Base62 = function () { | |
return { | |
decode: function(base62) { | |
s = base62.split('').reverse(); | |
total = 0; | |
$.each(s, function(index, _char) { | |
ord = SIXTYTWO.indexOf(_char); | |
if (ord != -1) { | |
total += ord * (Math.pow(62, index)); | |
} else { | |
console.log("invalid char: " + _char); | |
} | |
}); | |
return total; | |
} | |
} | |
}(); |
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