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20 lines
573 B
JavaScript
20 lines
573 B
JavaScript
'use strict';
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module.exports = function encode (num) {
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var base = 52;
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var characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
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var character = num % base;
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var result = characters[character];
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var remainder = Math.floor(num / base);
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if (remainder) {
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base = 64;
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characters = characters + '0123456789-_';
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while (remainder) {
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character = remainder % base;
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remainder = Math.floor(remainder / base);
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result = result + characters[character];
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}
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}
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return result;
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};
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