Quick helper to get all unique values present for objects in a given array. Useful for debugging.

uniq_value_counts.rb

#
# Returns a hash of all unique values for a given field and the number of objects
# in the array which have that value. 
# ex:
#   Post.all.uniq_value_counts(:status)
#     => {
#         "published" => 10,
#         "draft" => 13,
#         "archived" => 34
#       }
#

class Array
  def uniq_value_counts(field)
    self.inject(Hash.new(0)) do |hash, obj|
      hash[obj.send(field)] += 1
      hash
    end
  end
end