# 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