Files
JavaScript/String/GenerateGUID.js
Roland Hummel 86d333ee94 feat: Test running overhaul, switch to Prettier & reformat everything (#1407)
* chore: Switch to Node 20 + Vitest

* chore: migrate to vitest mock functions

* chore: code style (switch to prettier)

* test: re-enable long-running test

Seems the switch to Node 20 and Vitest has vastly improved the code's and / or the test's runtime!

see #1193

* chore: code style

* chore: fix failing tests

* Updated Documentation in README.md

* Update contribution guidelines to state usage of Prettier

* fix: set prettier printWidth back to 80

* chore: apply updated code style automatically

* fix: set prettier line endings to lf again

* chore: apply updated code style automatically

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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>
2023-10-04 02:38:19 +05:30

21 lines
721 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'