Return a random separation of the string. Default separation is by charaacter.

  "Ruby rules".at_rand(' ')  #~> ["Ruby"]

Return a random separation while removing it from the string. Default separation is by character.

  s = "Ruby rules"
  s.at_rand!(' ')    #~> "Ruby"
  s                  #~> "rules"

Return a random byte of self.

  "Ruby rules".rand_byte  #~> 121

Destructive rand_byte. Delete a random byte of self and return it.

  s = "Ruby rules"
  s.rand_byte!      #~> 121
  s                 #~> "Rub rules"

Return a random string index.

  "Ruby rules".rand_index  #~> 3

Return the string with seperated sections arranged in a random order. The default seperation is by character.

  "Ruby rules".shuffle  #~> "e lybRsuur"

In place version of shuffle.