ruby - 通过一些键和其他键的总和值合并哈希数组

Question

我有一个类似的数组

array = [
  {"point"=>6, "score"=>4, "team"=>"Challenger"},
  {"point"=>4, "score"=>2, "team"=>"INB"},
  {"point"=>2, "score"=>2, "team"=>"Super-11"},
  {"point"=>3, "score"=>7, "team"=>"INB"}
]

我想按“团队”合并散列并对“点”和“分数”的值求和。如果点大于 5，还想在每个散列中插入一个“合格”键。因此最终结果将是:

result= [
      {"point"=>6, "score"=>4, "qualified"=> "yes", "team"=>"Challenger"},
      {"point"=>7, "score"=>9, "qualified"=> "yes", "team"=>"INB"},
      {"point"=>2, "score"=>2, "qualified"=> "no", "team"=>"Super-11"}
    ]

如有任何帮助，我们将不胜感激。谢谢!

Answer 1

另一种可能的解决方案:)

array.group_by { |item| item['team'] }.map do |_, items| 
  result = items.inject({}) { |hash, item| hash.merge(item) { |_, old, new| Integer(old) + new rescue old } }
  result.merge("qualified" => result['point'] > 5 ? "yes" : "no")
end