How Can I Generate Unique Random Strings Within a Specific Length Range in Golang?

How to Generate Unique Random Strings in a Length Range Using Go?

To generate a unique random string within a specific length range in Go, consider the following factors:

Uniqueness Level:

• Universally Unique: This requires using UUIDs (Universally Unique Identifiers). A UUID is a 128-bit value that is guaranteed to be unique. To generate a UUID in Go, refer to the following resources:

  • https://en.wikipedia.org/wiki/Universally_unique_identifier
  • https://godoc.org/github.com/google/uuid

Display Format:

• Hexadecimal (Hex): A UUID displayed in hexadecimal format consists of 32 characters.
• Unicode: Unicode provides a wide range of code points, enabling the display of random strings in various languages. Go's strings are encoded in UTF-8, allowing for the use of Unicode characters.

Implementation:

• UUIDs: If you require a highly unique random string, using a UUID is recommended as they are universally unique.

• Pseudo-Random String: For lower levels of uniqueness, you can use the following approach:

  <code class="go">package main
  
  import (
      "crypto/rand"
      "fmt"
  )
  
  func main() {
      n := 10 // Length of the random string
      b := make([]byte, n)
      if _, err := rand.Read(b); err != nil {
          panic(err)
      }
      s := fmt.Sprintf("%X", b)
      fmt.Println(s)
  }</code>

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  This code generates a random string of length 10 and prints it in hexadecimal format.

Other Considerations:

• Refer to the following resources for additional information:

  • https://godoc.org/github.com/google/uuid
  • https://stackoverflow.com/questions/22892120/how-to-generate-a-random-string-of-a-fixed-length-in-golang
  • https://stackoverflow.com/questions/15582002/output-uuid-in-go-as-a-short-string

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