Built in now:
[1,2,3,4].shuffle => [2, 1, 3, 4][1,2,3,4].shuffle => [1, 3, 2, 4]
For ruby 1.8.6 (which does not have shuffle built in):
array.sort_by { rand }
For ruby 1.8.6 as sepp2k's example, but you still want use "shuffle" method.
class Array def shuffle sort_by { rand } endend[1,2,3,4].shuffle #=> [2,4,3,1][1,2,3,4].shuffle #=> [4,2,1,3]
cheers