Inject vs. Each With Object

inject_vs_each_with_object.rb

#!/usr/bin/env ruby

inputs = [[1,2,3], [2,4,6], [1,3,5]]

inject_output = inputs.inject([]) do |memo, input|
  memo |= input
  memo
end

each_with_object_output = inputs.each_with_object([]) do |input, memo|
  memo |= input
  # puts memo.inspect
  # Expected output from puts
  ## 1: [1, 2, 3]
  ## 2: [1, 2, 3, 4, 6]
  ## 3: [1, 2, 3, 4, 5, 6]
end

# Expected output => [1, 2, 3, 4, 5, 6]

puts inject_output.inspect  # => [1, 2, 3, 4, 5, 6]
puts each_with_object_output.inspect # => []