End of Life Ruby 3.2 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →

instance method

Random::Formatter#alphanumeric

alphanumeric(n=nil)

lib/random/formatter.rb View on GitHub ↗

# File tmp/rubies/ruby-3.2.0/lib/random/formatter.rb, line 240
def alphanumeric(n=nil)
  n = 16 if n.nil?
  choose(ALPHANUMERIC, n)
end

Generate a random alphanumeric string.

The argument n specifies the length, in characters, of the alphanumeric string to be generated.

If n is not specified or is nil, 16 is assumed. It may be larger in the future.

The result may contain A-Z, a-z and 0-9.

Example

require 'random/formatter'

Random.alphanumeric     #=> "2BuBuLf3WfSKyQbR"
# or
prng = Random.new
prng.alphanumeric(10) #=> "i6K93NdqiH"

See also #base64 #choose also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1 · 3.0