将对象数组转换为Swift中的字典

huangapple
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英文:

Array of objects to Dictionary in Swift

问题

Here's the translated code portion:

  1. 我有一个类似的数组
  3. var data: [UserModal] = [
  4.     UserModal(unit: "Unit 1", data: [
  5.         ScoreModal(name: "Ney", score: 10 ),
  6.         ScoreModal(name: "Mes", score: 20 ),
  7.         ScoreModal(name: "Ro", score: 30 ),
  8.         ScoreModal(name: "Su", score: 40 ),
  9.     ]),
  10.     UserModal(unit: "Unit 2", data: [
  11.         ScoreModal(name: "Ney", score: 10 ),
  12.         ScoreModal(name: "Mes", score: 20 ),
  13.         ScoreModal(name: "Ro", score: 30 ),
  14.         ScoreModal(name: "Su", score: 40 ),
  15.     ]),
  16.     UserModal(unit: "Unit 3", data: [
  17.         ScoreModal(name: "Ney", score: 10 ),
  18.         ScoreModal(name: "Mes", score: 20 ),
  19.         ScoreModal(name: "Ro", score: 30 ),
  20.         ScoreModal(name: "Su", score: 40 ),
  21.     ]),
  22. ]
  24. 我想计算成员的总分，如下：
  26. var result: [ScoreModal] = [
  27.     ScoreModal(name: "Ney", score: 30 ),
  28.     ScoreModal(name: "Mes", score: 60 ),
  29.     ScoreModal(name: "Ro", score: 90 ),
  30.     ScoreModal(name: "Su", score: 120 ),
  31. ]
  33. 我尝试使用 map 进行操作，但没有成功，请帮助我

If you have any further questions or need assistance with the code, feel free to ask.

英文:

I have an array of like

  1.  var data: [UserModal] = [
  2.         UserModal(unit: "Unit 1", data: [
  3.             ScoreModal(name: "Ney", score: 10 ),
  4.             ScoreModal(name: "Mes", score: 20 ),
  5.             ScoreModal(name: "Ro", score: 30 ),
  6.             ScoreModal(name: "Su", score: 40 ),
  7.         ]),
  8.         UserModal(unit: "Unit 2", data: [
  9.             ScoreModal(name: "Ney", score: 10 ),
  10.             ScoreModal(name: "Mes", score: 20 ),
  11.             ScoreModal(name: "Ro", score: 30 ),
  12.             ScoreModal(name: "Su", score: 40 ),
  13.         ]),
  14.         UserModal(unit: "Unit 3", data: [
  15.             ScoreModal(name: "Ney", score: 10 ),
  16.             ScoreModal(name: "Mes", score: 20 ),
  17.             ScoreModal(name: "Ro", score: 30 ),
  18.             ScoreModal(name: "Su", score: 40 ),
  19.         ]),
  20.     ]

I want to calculate the total score of the members like:

  1.   var result: [ScoreModal] = [
  2.         ScoreModal(name: "Ney", score: 30 ),
  3.         ScoreModal(name: "Mes", score: 60 ),
  4.         ScoreModal(name: "Ro", score: 90 ),
  5.         ScoreModal(name: "Su", score: 120 ),
  6.     ]

I tried to manipulate the map but it didn't work
please help me

答案1

得分: 1

接受 @Sumida's 的答案，我刚刚更新了动态键。

  1. var nameArray = data.map { model in
  2.     var array = [String]()
  3.     guard let arrayModel = model.data else {
  4.         return array
  5.     }
  6.     for data in arrayModel {
  7.         array.append(data.name ?? "")
  8.     }
  9.     return array
  10. }
  11. let flattenedArray = nameArray.reduce([], +)
  12. print(flattenedArray)
  14. let uniqueArray = Array(Set(flattenedArray))
  15. print(uniqueArray)
  17. var scoreModal: [ScoreModal] = []
  19. uniqueArray.forEach{ key in
  20.     var totalScore = 0
  21.     data.forEach{ user in
  22.         user.data?.filter{ $0.name == key}.forEach{ totalScore += $0.score ?? 0 }
  23.     }
  24.     scoreModal.append(ScoreModal(name: key, score: totalScore))
  25. }
  27. print("ScoreModal: \(scoreModal)")
英文:

Accept @Sumida's answer i just made update for dynamic keys.

  1. var nameArray = data.map { model in
  2.     var array = [String]()
  3.     guard let arrayModel = model.data else {
  4.         return array
  5.     }
  6.     for data in arrayModel {
  7.         array.append(data.name ?? "")
  8.     }
  9.     return array
  10. }
  11. let flattenedArray = nameArray.reduce([], +)
  12. print(flattenedArray)
  14. let uniqueArray = Array(Set(flattenedArray))
  15. print(uniqueArray)
  17. var scoreModal: [ScoreModal] = []
  19. uniqueArray.forEach{ key in
  20.     var totalScore = 0
  21.     data.forEach{ user in
  22.         user.data?.filter{ $0.name == key}.forEach{ totalScore += $0.score ?? 0 }
  23.     }
  24.     scoreModal.append(ScoreModal(name: key, score: totalScore))
  25. }
  27. print("ScoreModal: \(scoreModal)")

答案2

得分: 1

使用简单的forEach循环和filter，将计算成员的总分，就像您展示的results一样：

  1. var result: [ScoreModal] = []
  3. ["Ney","Mes","Ro","Su"].forEach{ key in
  4.     var totalScore = 0
  5.     data.forEach{ user in
  6.         user.data.filter{ $0.name == key}.forEach{ totalScore += $0.score }
  7.     }
  8.     result.append(ScoreModal(name: key, score: totalScore))
  9. }
  11. print("---> result: \(result)")

请注意，如果您不想使用关键字数组，可以替换为：

  1. Set(data.map{$0.data.map{$0.name}}.flatMap{$0}).forEach{ key in
  2.    ....
  3. }
英文:

Using simple forEach loops and a filter, will calculate the total score of the members, like the results you show:

  1. var result: [ScoreModal] = []
  3. ["Ney","Mes","Ro","Su"].forEach{ key in
  4.     var totalScore = 0
  5.     data.forEach{ user in
  6.         user.data.filter{ $0.name == key}.forEach{ totalScore += $0.score }
  7.     }
  8.     result.append(ScoreModal(name: key, score: totalScore))
  9. }
  11. print("---> result: \(result)")

Note, if you don't want to use the array of keys, replace it with:

  1.  Set(data.map{$0.data.map{$0.name}}.flatMap{$0}).forEach{ key in
  2.    ....
  3.  }

huangapple
  • 本文由 发表于 2023年6月15日 11:50:38
  • 转载请务必保留本文链接：https://go.coder-hub.com/76478970.html
  • swift
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