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

I can get what I want by calling inject

a = [{:a => 1},{:a => 2}, {:a => 1}]
a.inject([]) { |result,h| result << h unless result.include?(h); result }

This will return:

[{:a=>1}, {:a=>2}]