Lets you add items in groups of priority. Useful if you've got 10 tasks to run, and need 1,2,3 to happen before 4,5,6,7 and then 8,9 before 10 but don't care about the order in each cluster.
ap = ArrayWithPriority.new
ap << :foo # default priority is 5
ap.push :bar, :priority => 2
ap.push :sed, :priority => 2
ap.push :fud, :priority => 10
ap.to_a # => [[:bar, :sed], [:foo], [:fud]]
gem install array_with_priority
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