Remove duplicate elements
You are encouraged to solve this task according to the task description, using any language you may know.
Given a Array, create a derived Array containing only the unique elements
Ruby
ary = [1,1,2,1,'redundant',[1,2,3],[1,2,3],'redundant'] uniq_ary = ary.uniq # => [1, 2, "redundant", [1, 2, 3]]