Javascript random characters
// Asynchronous const crypto = require('crypto'); function getRandomChars(len, callback) { const CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; const NUM_CHARS = CHARS.length; crypto.randomBytes(len, (err, buf) => { let result = ""; buf.forEach(b => { let idx = Math.floor(b * NUM_CHARS / 256); result += CHARS[idx]; }); callback(null, result); }); }
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