one-knowledge/github-knowledge/uncategorised.md

title, created, updated, type, tags, external

title	created	updated	type	tags	external
Uncategorised	2018-06-12	2018-06-12	summary	tech reference	https://github.com/wahyd4/knowledge/blob/master/categories/uncategorised.md

Uncategorised

Some interesting questions

UUID or UUID4

• UUID use current time and your computer MAC address to generate the id
• UUID4 which is much simpler. Each and every bit of a UUID v4 is generated randomly and with no inherent logic. With the sheer number of possible combinations (2^128), it would be almost impossible to generate a duplicate unless you are generating trillions of IDs every second, for many years.