How to generate a random string of a fixed length

Question

I want a random string of characters only (uppercase or lowercase), no numbers, in Go. What is the fastest and simplest way to do this?

Answer 1

in addition I've found a package which have bunch of methods to manipulate fake data. Found it useful for seeding database while developing https://github.com/Pallinder/go-randomdata. Might be helpful to someone else as well

Answer 2

Here is my way ) Use math rand or crypto rand as you wish.

func randStr(len int) string {
    buff := make([]byte, len)
    rand.Read(buff)
    str := base64.StdEncoding.EncodeToString(buff)
    // Base 64 can be longer than len
    return str[:len]
}