arrays - 查找和删除自定义数组类型中的重复项

我有以下基于节点/键组合的类：

class cellData {
   let nodeText : String
   let keyText : String

   init(nodeText: String, keyText: String) {
      self.nodeText = nodeText
      self.keyText = keyText
   }

   var desription: String { return "<Node; name: \(nodeText); key; \(keyText)>" }
}

基于上面的类，我创建了两个集合：

var firstSetData = [cellData]()
var secondSetData = [cellData]()

firstSetData = [cellData(nodeText: "a", keyText: "1"),
                cellData(nodeText: "a", keyText: "2"),
                cellData(nodeText: "c", keyText: "42")]

 secondSetData = [cellData(nodeText: "a", keyText: "1"),
                  cellData(nodeText: "b", keyText: "100"),
                  cellData(nodeText: "c", keyText: "2"),
                  cellData(nodeText: "d", keyText: "1")]

我需要一个函数，该函数将返回第三组类“ cellData”，但仅具有同一节点/键组合的唯一实例。这意味着我的最终设定必须如下所示：

finalSet = [cellData(nodeText: "a", keyText: "1"),
            cellData(nodeText: "a", keyText: "2"),
            cellData(nodeText: "b", keyText: "100"),
            cellData(nodeText: "c", keyText: "2"),
            cellData(nodeText: "c", keyText: "42")]
            cellData(nodeText: "d", keyText: "1")]

我尝试了类似的方法，但效果不佳：

for node in combinedSetData {
    if (combinedSetData.filter({$0.nodeText == node.nodeText && $0.keyText == node.keyText})).count > 1 {
     // remove duplicate elements and append to new set
     }

 }

如果可能，最好使用Swift 3。先感谢您！

最佳答案

首先，使您的cellData类符合Equatable：

class cellData : Equatable {
   static func ==(lhs: cellData, rhs: cellData) -> Bool {
        return lhs.nodeText == rhs.nodeText && lhs.keyText == rhs.keyText
    }

    // ...
}

然后构建您的finalSetData很简单：

var finalSetData = [cellData]()
(firstSetData + secondSetData).forEach {
    if !finalSetData.contains($0) {
        finalSetData.append($0)
    }
}

// To match the order in your example...
finalSetData.sort {
    if $0.nodeText != $1.nodeText {
        return $0.nodeText < $1.nodeText
    } else {
        return $0.keyText < $1.keyText
    }
}

其他几点：


desription拼写错误
您最好也使该类符合CustomStringConvertible
遵循Swift的命名约定。稍后您将感谢您。将班级重命名为CellData

关于arrays - 查找和删除自定义数组类型中的重复项，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40642069/