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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