How do I get the unique elements from an array of hashes in Ruby?

Question

I have an array of hashes, and I want the unique values out of it. Calling Array.uniq doesn\'t give me what I expect.

a = [{:a => 1},{:a =&g         


        

Answer 1

The pipe method on arrays (available since 1.8.6) performs set union (returning an array), so the following is another possible way to get unique elements of any array a:

[] | a