mirror of
https://github.com/TheAlgorithms/JavaScript.git
synced 2025-07-05 16:26:47 +08:00
19 lines
707 B
JavaScript
19 lines
707 B
JavaScript
/*
|
|
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
|
|
*/
|
|
|
|
export 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)
|
|
})
|
|
}
|
|
|
|
// > Guid()
|
|
// 'edc848db-3478-1760-8b55-7986003d895f'
|