Ruby - Best way to map objects into one array with fixed key

Question

I try to merge some object into one array I did output by q = [["99","99","99"],["9"]] o = [["b","1"],["c","3"],["d","1"],["c","30"]] puts q.zip(o).map { |k,v| [*k,v] }.to_json => [["99",["b","1"]],["99",["c","3"]],["99",["d","1"]],["9",["c","30"]]] i'm looking for best way to [{"99"=>{"b"=>"1", "c"=>"3", "d"=>"1"}},{"9"=>{"c"=>"30"}] JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

a = [["9",["b","8"]],["9",["c","2"]],["9",["d","6"]]] a.group_by(&:first).transform_values{|a| a.map(&:last).to_h} # => {"9"=>{"b"=>"8", "c"=>"2", "d"=>"6"}} a.group_by(&:first).transform_values{|a| a.map(&:last).to_h}.map{|k, v| {k => v}} # => [{"9"=>{"b"=>"8", "c"=>"2", "d"=>"6"}}]