go-rand
A painless convenience wrapper around math/rand and crypto/rand
Installation: go get github.com/cat-dealer/go-rand/v2
Full documentation: godoc
Examples
Pseudo-random
Generating pseudo-random integers, booleans and bytes
bytes := rand.Bytes(16) // returns 16 bytes
int := rand.Int(1, 3) // returns 1, 2 or 3
bool := rand.Bool() // returns true or false
Strings and runes can only be generated from a predefined pool of allowed characters; you can either provide your own pool:
str := rand.String(4, []rune{'a', 'b', 'c'}) // returns 4 random characters from the []rune slice
or use one of the built-in pools:
str := rand.String(4, rand.GetAlphanumericPool()) // returns 4 letters or numbers
Cryptographically random
Generating cryptographically secure random values isn't any harder than generating pseudo-random ones:
bytes, err := rand.SecureBytes(16) // returns 16 bytes
int, err := rand.SecureInt(1, 3) // return 1, 2 or 3
bool, err := rand.SecureBool() // returns true or false
Strings are just as easy:
str, err := rand.SecureString(4, rand.GetAlphanumericPool()) // returns 4 letters or numbers
Important note
This package may panic if called with impossible parameters (e.g. rand.Int(0, -1)) or using empty pool slices for rune/string generation!