C# 使用外部条件对列表进行排序的方法

Question

我将简要解释该函数正在做什么/应该做什么:

• 参数:需要的设施列表
• 返回:满足超过 50% 的设施的原型(prototype)列表需要
• 原型(prototype)具有 X 数量的设施(存储在数据库中)。
• 用户提供他想要满足的设施列表(参数)

• 函数查找哪种原型(prototype)最适合所有提供的设施。

  public List<ArchetypesLokaal> GetArchetypeUitFaciliteiten(List<FaciliteitenLokaalFixed> faciliteiten)
  {
      var archetypes = new List<ArchetypesLokaal>();
      var sortedArchetypes = new List<ArchetypesLokaal>();
  
  
      //Iterate over all the archetypes
      foreach(var archetype in db.ArchetypesLokaals)
      {
          //Get all the facilities that are present in archetype
          var temp = GetFaciliteitenVoorArchetype(archetype);
  
          //Create a new list to add all the facilities that are matched
          var temp2 = new List<FaciliteitenLokaalFixed>();
  
          //Iterate over the facilities provided as a parameter, these are the facilities that have to be present in the archetype
          foreach(var faciliteit in faciliteiten)
          {
              //CHeck if facility is present in an archetype
              var aanwezig = temp.FirstOrDefault(t => t.Naam.Equals(faciliteit.Naam));
              if (aanwezig!=null)
              {
                  //Add if it's present
                  temp2.Add(faciliteit);
              }
          }
          var needed = faciliteiten.Count;
          var present = temp2.Count;
  
          //Compare how many facilities were met
          if (present / needed >= .5)
          {
              archetypes.Add(archetype);
          }
      }
  
     //Todo: sort archetypes by % facilities that were met
      return archetypes;
  }
  

所以现在我想根据现在/需要对我的列表进行排序，这样我可以首先显示最好的结果。我也不确定我正在做的事情是否是处理此问题的最有效方法，但我确信我的代码现在可以正常工作。如果您有任何建议，请务必提出。

谢谢。

Answer 1

如果我理解正确，您需要根据 present = temp2.​​Count 局部变量对输出进行排序。您可以将结果包装在某个容器中，例如 Tuple :

var archetypes = new List<Tuple<int, ArchetypesLokaal>>();

//Iterate over all the archetypes
foreach(var archetype in db.ArchetypesLokaals)
{
    //Get all the facilities that are present in archetype
    var temp = GetFaciliteitenVoorArchetype(archetype);

    //Create a new list to add all the facilities that are matched
    var temp2 = new List<FaciliteitenLokaalFixed>();

    //Iterate over the facilities provided as a parameter, these are the facilities that have to be present in the archetype
    foreach(var faciliteit in faciliteiten)
    {
        //CHeck if facility is present in an archetype
        var aanwezig = temp.FirstOrDefault(t => t.Naam.Equals(faciliteit.Naam));
        if (aanwezig!=null)
        {
            //Add if it's present
            temp2.Add(faciliteit);
        }
    }
    var needed = faciliteiten.Count;
    var present = temp2.Count;

    //Compare how many facilities were met
    if (present / needed >= .5)
    {
        archetypes.Add(new Tuple<int, ArchetypesLokaal>(present, archetype));
    }
}

return archetypes.OrderByDescending(q => q.Item1).Select(q => q.Item2).ToList();