C# HashSet<;T>;在不使用LINQ的情况下使用自定义IComparer进行排序
场景 我有一个自定义类(称为C# HashSet<;T>;在不使用LINQ的情况下使用自定义IComparer进行排序,c#,collections,interface,hashset,icomparer,C#,Collections,Interface,Hashset,Icomparer,场景 我有一个自定义类(称为FeedData),它将收集在HashSet 我现在有了一个自定义的IComparer,它可以帮助将HashSet从最近到最远的位置排序到用户的位置。比较发生在FeedData.Location internal sealed class DistanceComparer : IComparer<FeedData> { private CheapRuler cheapRuler; private Vector2d userLocation
FeedData
),它将收集在HashSet
我现在有了一个自定义的IComparer
,它可以帮助将HashSet
从最近到最远的位置排序到用户的位置。比较发生在FeedData.Location
internal sealed class DistanceComparer : IComparer<FeedData>
{
private CheapRuler cheapRuler;
private Vector2d userLocation;
//Constructor
internal DistanceComparer(Vector2d _currentLocation)
{
this.userLocation = _currentLocation;
this.cheapRuler = new Geo.CheapRuler(userLocation.x, Geo.CheapRulerUnits.Meters);
}
// Interface IComparer<FeedData> implementation
int IComparer<FeedData>.Compare(FeedData _feedA, FeedData _feedB)
{
int _comparision = cheapRuler.Distance(_feedA.Location, userLocation)
.CompareTo(cheapRuler.Distance(_feedB.Location, userLocation));
return _comparision;
}
}
内部密封类距离比较器:IComparer
{
私人小气鬼小气鬼;
私有向量2D用户位置;
//建造师
内部距离比较器(矢量2D\u当前位置)
{
this.userLocation=\u currentLocation;
this.cheapRuler=new Geo.cheapRuler(userLocation.x,Geo.CheapRulerUnits.Meters);
}
//接口IComparer实现
int IComparer.比较(FeedData\u feedA,FeedData\u feedB)
{
int\u comparison=cheapRuler.Distance(\u feedA.Location,userLocation)
.CompareTo(cheap尺子距离(_feedB.Location,userLocation));
返回-比较;
}
}
目标
如果不使用System.Linq
如何对HashSet
使用HashSet而不是另一个集合(比如List)的原因是,任何时候FeedData的计数都可能显著高于性能检查。
[]
哈希集上的其他操作
- 插入/添加
FeedData
- 删除项目
internal sealed class DistanceComparer : IComparer<FeedData>
{
private CheapRuler cheapRuler;
private Vector2d userLocation;
//Constructor
internal DistanceComparer(Vector2d _currentLocation)
{
this.userLocation = _currentLocation;
this.cheapRuler = new Geo.CheapRuler(userLocation.x, Geo.CheapRulerUnits.Meters);
}
// Interface IComparer<FeedData> implementation
int IComparer<FeedData>.Compare(FeedData _feedA, FeedData _feedB)
{
int _comparision = cheapRuler.Distance(_feedA.Location, userLocation)
.CompareTo(cheapRuler.Distance(_feedB.Location, userLocation));
return _comparision;
}
}