# File lib/rye.rb, line 255
255:   def strand( len=8, safe=true )
256:      chars = ("a".."z").to_a + ("0".."9").to_a
257:      chars.delete_if { |v| %w(i l o 1 0).member?(v) } if safe
258:      str = ""
259:      1.upto(len) { |i| str << chars[rand(chars.size-1)] }
260:      str
261:   end