From: nobu@...
Date: 2015-02-13T02:41:30+00:00
Subject: [ruby-core:68104] [Ruby trunk - Feature #10849] Adding an alphanumeric function to SecureRandom

Issue #10849 has been updated by Nobuyoshi Nakada.


> The length of the result string is about 4/3 of _n_.

I don't like this interface.

~~~ruby
  def self.choose(source, length)
    size = source.size
    length.times.map {source[random_number(size)]}.join('')
  end

  GRAPH = [*'!'..'~']
  def self.graph(length)
    choose(GRAPH, length)
  end

  ALPHANUMERIC = [*'A'..'Z', *'a'..'z', *'0'..'9']
  # SecureRandom.alphanumeric generates a random alphanumeric string.
  #
  # The argument _n_ specifies the length of the random number to be
  # generated.
  #
  # The result may contain A-Z, a-z and 0-9.
  #
  #   p SecureRandom.alphanumeric #=> "2BuBuLf3WfSKyQbRccA"
  #   p SecureRandom.alphanumeric #=> "6BbW0pxO0YENxn38HMUbcQ"
  #
  # If a secure random number generator is not available,
  # +NotImplementedError+ is raised.
  def self.alphanumeric(length)
    choose(ALPHANUMERIC, length)
  end
~~~

----------------------------------------
Feature #10849: Adding an alphanumeric function to SecureRandom
https://bugs.ruby-lang.org/issues/10849#change-51482

* Author: Andrew Butterfield
* Status: Open
* Priority: Normal
* Assignee: Andrew Butterfield
----------------------------------------
It would be handy to have a method that produces a random alphanumeric string.

---Files--------------------------------
securerandom.txt (1.32 KB)
securerandom.patch (1.32 KB)


-- 
https://bugs.ruby-lang.org/