Shuffle an array in Ruby

I needed to randomly sort the elements in an array in the Ruby on Rails project I'm working on.

Turns out these things are just way too easy in Ruby:

  [1, 2, 3].shuffle
  >> [3, 1, 2]

Credits to Tom Klaasen for improving the more complex snippet I found before.

Or you can use the rand method when you only need one single element and don't need to shuffle the whole array in Ruby 1.8:

  [1, 2, 3].rand
  >> 3

And for Ruby 1.9:

  [1, 2, 3].sample
  >> 3

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