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michael_wuvs.XabiAyca

Twin Sum Solutions (Ruby)

Code
Diff
  • def twin_sum_solutions(array)
  array.tally.each_pair.with_object([]) do | (v, count), res | 
    res << v * 2 if count == 2 
  end
end
    • def twin_sum_solutions(array)
    • array.each_with_object([]) do |element, memo|
    • next if memo.include? element * 2
    • memo << element * 2 if array.count(element) > 1
    • array.tally.each_pair.with_object([]) do | (v, count), res |
    • res << v * 2 if count == 2
    • end
    • end