You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
19 lines
746 B
19 lines
746 B
import { randomBytes } from 'crypto'; |
|
|
|
|
|
// Copied from https://github.com/louischatriot/nedb/blob/master/lib/customUtils.js |
|
|
|
/** |
|
* Return a random alphanumerical string of length len |
|
* There is a very small probability (less than 1/1,000,000) for the length to be less than len |
|
* (il the base64 conversion yields too many pluses and slashes) but |
|
* that's not an issue here |
|
* The probability of a collision is extremely small (need 3*10^12 documents to have one chance in a million of a collision) |
|
* See http://en.wikipedia.org/wiki/Birthday_problem |
|
*/ |
|
export function uid(len: number): string { |
|
return randomBytes(Math.ceil(Math.max(8, len * 2))) |
|
.toString('base64') |
|
.replace(/[+\/]/g, '') |
|
.slice(0, len); |
|
} |