id

Documentation

Overview

Package id generates random n-digit IDs.

Index

• Constants
• func New(length int, charset string) string

Constants

const (
	AlphanumCaseSensitiveDigits   = "abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ123456789"
	AlphanumCaseInsensitiveDigits = "ABCDEFGHJKLMNPQRSTUVWXYZ123456789"
)

Functions

func New

func New(length int, charset string) string

New returns a randomly created ID string. It is not guaranteed to be unique.

Risk estimation can look like this, assuming six AlphanumCaseInsensitiveDigits and five tries:

33^6 ≈ 10^9 different combinations
/ 10^6 purchases
= 10^-3 risk of individual ID being not unique
^ 5 because we do five tries
= 10^-15 risk of none of five IDs being not unique
/ 10^6 purchases
= 10^-9 overall risk of failing