module Random::String::Self

Class-level methods.

Public Instance Methods

rand_letter() click to toggle source

Module method to generate a random letter.

String::Random.rand_letter  #=> "q"
String::Random.rand_letter  #=> "r"
String::Random.rand_letter  #=> "a"
# File lib/more/facets/random.rb, line 373
def rand_letter
  (Random.number(26) + (Random.number(2) == 0 ? 65 : 97) ).chr
end
random(max_length = 8, char_re = /[\w\d]/) click to toggle source

Returns a randomly generated string. One possible use is password initialization. Takes a max legnth of characters (default 8) and an optional valid char Regexp (default /wd/).

# File lib/more/facets/random.rb, line 354
def random(max_length = 8, char_re = /[\w\d]/)
  # gmosx: this is a nice example of input parameter checking.
  # this is NOT a real time called method so we can add this
  # check. Congrats to the author.
  raise ArgumentError.new('char_re must be a regular expression!') unless char_re.is_a?(Regexp)
  string = ""
  while string.length < max_length
      ch = Random.number(255).chr
      string << ch if ch =~ char_re
  end
  return string
end