priority merge example 7 (out of order)

example_7.rb

a1 = 50.times.map { 1 }
a2 = 50.times.map { 2 }

puts "when priority is 1.0"
result = 50.times.map do
  result = a1.priority_merge(1.0, a2)
  result.select { |item| item == 2 }.count.to_f / a1.length.to_f
end
puts "results contain on average #{result.mean}% elements from the merged array"
# => will be around 50%

puts "when priority is 0.5"
result = 50.times.map do
  result = a1.priority_merge(0.5, a2)
  result.select { |item| item == 2 }.count.to_f / a1.length.to_f
end
puts "results contain on average #{result.mean}% elements from the merged array"
puts result.mean
# => will be around 25%

puts "when priority is 0"
result = 50.times.map do
  result = a1.priority_merge(0.0, a2)
  result.select { |item| item == 2 }.count / a1.length.to_f
end
puts "results contain on average #{result.mean}% elements from the merged array"
# => will be zero