Grand

Grand is a Go random string generator.

Installation

go get github.com/ernsheong/grand

Usage

1. IMPORTANT. Seed rand first to ensure you don't get the same string on every code run (initialize):

   rand.Seed(time.Now().UTC().UnixNano())
   

   or

   rand.Seed(time.Now().Unix())
   

2. Generate your random string, given a length parameter n:

   grand.GenerateRandomString(32)
   // returns "qzrWbaoLTVpQoottZyPFfNOoMioXHRuF"
   

3. Generate random string from other character sets:

   gen := grand.NewGenerator(grand.CharSetBase62)
   gen.GenerateRandomString(20)
   // returns "q3rWba2LTVpQ4ottZyPv"
   

Concurrency

From the math/rand docs:

The default Source is safe for concurrent use by multiple goroutines

grand uses the default Source, and hence is safe to be called from multiple goroutines, at a slight performance penalty. See https://stackoverflow.com/a/31832326/1161743 for details.

Credits

I claim no credit for the generation logic. It's originally from user icza in https://stackoverflow.com/a/31832326/1161743.