Random password generation with Ruby

Suppose we want to generate a random, robust and fairly secure password using Ruby then we create a "random_password" function that returns a password with 12 characters or if we want one with more or less we have to pass this value as a parameter.

First we define the range of characters allowed for the password

$CHARS = ('0'..'9').to_a + ('A'..'Z').to_a + ('a'..'z').to_a + ('#'..'&').to_a + (':'..'?').to_a

then the function

def random_password(length=12)
  (0..length).each do
  return p

Finally, just use the newly created function to have the random password:

puts random_password
puts random_password(15)
puts test_pwd

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