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19 lines
746 B
19 lines
746 B
6 years ago
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import { randomBytes } from 'crypto';
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// Copied from https://github.com/louischatriot/nedb/blob/master/lib/customUtils.js
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/**
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* Return a random alphanumerical string of length len
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* There is a very small probability (less than 1/1,000,000) for the length to be less than len
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* (il the base64 conversion yields too many pluses and slashes) but
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* that's not an issue here
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* The probability of a collision is extremely small (need 3*10^12 documents to have one chance in a million of a collision)
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* See http://en.wikipedia.org/wiki/Birthday_problem
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*/
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export function uid(len: number): string {
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return randomBytes(Math.ceil(Math.max(8, len * 2)))
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.toString('base64')
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.replace(/[+\/]/g, '')
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.slice(0, len);
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}
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