parking_spots.rb

candidates = [:burke, :kevin, :lisa, :mark, :afolabi, :brent, :tiffany, :cary, :peer, :brock, :john, :keith, :brad, :ryan]

# Let's let everyone make their own choice :P
occurrences = candidates.inject({}) {|h,candidate| h[candidate] = candidates.sample(3); h}

# Now tally them up
counts = occurrences.values.flatten.inject({}) {|h,person| h[person] ||= 0; h[person] += 1; h}

sorted = counts.sort {|a,b| b.last <=> a.last }

puts sorted.first(3).map(&:first).join(', ')