生成字符
def st(length=2)
chars = 'abcdefghjkmnpqrstuvwxz'
string = ''
length.downto(1) { |i| string <<chars[rand(chars.length - 1)] }
string
end
生成字符
def st(length=2)
chars = 'abcdefghjkmnpqrstuvwxz'
string = ''
length.downto(1) { |i| string <<chars[rand(chars.length - 1)] }
string
end