swift - 相当于 Swift 中的 Java LinkedHashSet

Question

在java中我们有:

private Set<AutoComplete> hashList = new LinkedHashSet<>();

和:

public class AutoComplete {

    private String name;
    private String id;

    //...geters and setters

    @Override
    public boolean equals(Object o) {
        if (o instanceof AutoComplete) {
            AutoComplete autoComplete = (AutoComplete) o;
            if (name.equals(autoComplete.name) && id.equals(autoComplete.id))
                return true;
        }
        return false;
    }

    @Override
    public int hashCode() {
        int hash = 17;
        int hashMultiplikator = 79;
        try {
            hash = hashMultiplikator * hash
                    + getId().hashCode();
        } catch (java.lang.Exception e) {
            e.printStackTrace();
            MLogger.logException("autocomplete id can't be null", e);
        }
        return hash;
    }

然后当您将项目添加到 hashList 时，将不允许重复值并且列表是排序的。

所以我的问题是如何在 Swift 中做到这一点？!

我已经看到了 Does there exist within Swift's API an easy way to remove duplicate elements from an array?

当我将 AutoComplete 数组传递给 func uniq 时，

var namesAndIds : [AutoComplete] = []

(用于删除重复项:)

namesAndIds.appendContentsOf(SingletonMappingContacts.sharedInstance.autoComplete)
namesAndIds = uniq(namesAndIds)

func uniq<S : SequenceType, T : Hashable where S.Generator.Element == T>(source: S) -> [T] {
        var buffer = [T]()
        var added = Set<T>()
        for elem in source {
            if !added.contains(elem) {
                buffer.append(elem)
                added.insert(elem)
            }
        }
        return buffer
    }

我有这个:AutoComplete 类型的值没有成员元素

自动完成:

class AutoComplete{
    var id : String
    var name : String
    init(id: String,name: String) {
        self.name = name
        self.id = id
    }
}

Answer 1

对于想知道的人，我最终避免了如下所示的重复插入问题。但是这不会像 LinkedHashSet 那样排序 所以问题仍然存在!

我创造了

var namesAndIds = Set<AutoComplete>()
var finalAutoCompleteList = [AutoComplete]()

然后更正了 AutoComplete 类:

public class AutoComplete:NSObject{
    var id : String
    var name : String
    init(id: String,name: String) {
        self.name = name
        self.id = id
    }
    override public func isEqual(object: AnyObject?) -> Bool {
        if let object = object as? AutoComplete {
            return id == object.id
        } else {
            return false
        }
    }

    override public var hash: Int {
        return id.hashValue
    }

}

最后将Set添加到Array

finalAutoCompleteList = Array(namesAndIds)