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krokrob/reduce.rb

Created January 7, 2016 10:34
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reduce.rb
# REDUCE
# input: array
# output: single
numbers = [ 21, 36, 54, 18, 11]
sum = 0
numbers.each do |number|
sum += number
end
puts sum
variance = numbers.map { |number| number*number }.reduce(:+)
puts variance
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