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Add generateUUID.js #496

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Merged
ruppysuppy merged 2 commits into from
Oct 19, 2020
Merged

Add generateUUID.js #496

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b651e54
add generateUUID.js
Mozartuss Oct 17, 2020
f455cc3
Only Node.js version (delete crypto version (Browser))
Mozartuss Oct 18, 2020
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17 changes: 17 additions & 0 deletions String/GenerateGUID.js
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Original file line number Diff line number Diff line change
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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'
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