Created
November 17, 2019 15:31
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Short hash generator with collision checking
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| const letters = 'abcdefghijklmnopqrstuvwxyz'; | |
| const numbers = '1234567890'; | |
| const charset = letters + letters.toUpperCase() + numbers; | |
| function pickRandomElement(array) { | |
| const { floor, random } = Math; | |
| return array[floor(random() * array.length)]; | |
| } | |
| function randomString(length) { | |
| const { cache } = randomString; | |
| while (true) { | |
| let uid = ''; | |
| for (let i = 0; i < length; i++) { | |
| uid += pickRandomElement(charset); | |
| } | |
| if (!cache.has(uid)) { | |
| cache.add(uid); | |
| return uid; | |
| } | |
| } | |
| } | |
| randomString.cache = new Set(); |
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