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Merge pull request #496 from Mozartuss/master

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Add generateUUID.js
This commit is contained in:
Tapajyoti Bose
2020-10-19 09:45:49 +05:30
committed by GitHub
parent 6ef103fb4f f455cc3b09
commit 26f57adcf7
1 changed files with 17 additions and 0 deletions
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String/GenerateGUID.js Normal file
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/*
Generates a UUID/GUID in Node.Js.
The script uses `Math.random` in combination with the timestamp for better randomness.
The function generate an RFC4122 (https://www.ietf.org/rfc/rfc4122.txt) version 4 UUID/GUID
*/
const Guid = () => {
const pattern = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
let currentDateMilliseconds = new Date().getTime()
return pattern.replace(/[xy]/g, currentChar => {
const randomChar = (currentDateMilliseconds + Math.random() * 16) % 16 | 0
currentDateMilliseconds = Math.floor(currentDateMilliseconds / 16)
return (currentChar === 'x' ? randomChar : (randomChar & 0x7 | 0x8)).toString(16)
})
}
console.log(Guid()) // 'edc848db-3478-1760-8b55-7986003d895f'